42459661 has 4 divisors (see below), whose sum is σ = 44694400. Its totient is φ = 40224924.

The previous prime is 42459653. The next prime is 42459667. The reversal of 42459661 is 16695424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42459661 - 2³ = 42459653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42459661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42459667) 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, 1117341 + ... + 1117378.

It is an arithmetic number, because the mean of its divisors is an integer number (11173600).

Almost surely, 2^42459661 is an apocalyptic number.

It is an amenable number.

42459661 is a deficient number, since it is larger than the sum of its proper divisors (2234739).

42459661 is a wasteful number, since it uses less digits than its factorization.

42459661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234738.

The product of its digits is 51840, while the sum is 37.

The square root of 42459661 is about 6516.1078106489. The cubic root of 42459661 is about 348.8661566720.

The spelling of 42459661 in words is "forty-two million, four hundred fifty-nine thousand, six hundred sixty-one".