42165701 has 4 divisors (see below), whose sum is σ = 42857004. Its totient is φ = 41474400.

The previous prime is 42165689. The next prime is 42165709. The reversal of 42165701 is 10756124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6477025 + 35688676 = 2545^2 + 5974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42165701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42165709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345560 + ... + 345681.

It is an arithmetic number, because the mean of its divisors is an integer number (10714251).

Almost surely, 2^42165701 is an apocalyptic number.

It is an amenable number.

42165701 is a deficient number, since it is larger than the sum of its proper divisors (691303).

42165701 is an equidigital number, since it uses as much as digits as its factorization.

42165701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691302.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 42165701 is about 6493.5122237507. The cubic root of 42165701 is about 348.0591924899.

The spelling of 42165701 in words is "forty-two million, one hundred sixty-five thousand, seven hundred one".