42702661 has 4 divisors (see below), whose sum is σ = 42716524. Its totient is φ = 42688800.

The previous prime is 42702659. The next prime is 42702679. The reversal of 42702661 is 16620724.

42702661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

42702661 is a nontrivial binomial coefficient, being equal to C(9242, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32558436 + 10144225 = 5706^2 + 3185^2 .

It is a 3-Lehmer number, since φ(42702661) divides (42702661-1)³.

It is a cyclic number.

It is not a de Polignac number, because 42702661 - 2¹ = 42702659 is a prime.

It is a deceptive number, since it divides R_42702660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42702631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 9241.

It is an arithmetic number, because the mean of its divisors is an integer number (10679131).

It is a Poulet number, since it divides 2^42702660-1.

Almost surely, 2^42702661 is an apocalyptic number.

42702661 is the 9241-st triangular number and also the 4621-st hexagonal number.

42702661 is the 3081-st centered nonagonal number.

It is an amenable number.

42702661 is a deficient number, since it is larger than the sum of its proper divisors (13863).

42702661 is an equidigital number, since it uses as much as digits as its factorization.

42702661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13862.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 42702661 is about 6534.7273087712. The cubic root of 42702661 is about 349.5304206082.

The spelling of 42702661 in words is "forty-two million, seven hundred two thousand, six hundred sixty-one".