42615656 has 8 divisors (see below), whose sum is σ = 79904370. Its totient is φ = 21307824.

The previous prime is 42615653. The next prime is 42615659. The reversal of 42615656 is 65651624.

It is an interprime number because it is at equal distance from previous prime (42615653) and next prime (42615659).

It can be written as a sum of positive squares in only one way, i.e., 35593156 + 7022500 = 5966^2 + 2650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (42615653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2663471 + ... + 2663486.

Almost surely, 2^42615656 is an apocalyptic number.

It is an amenable number.

42615656 is a deficient number, since it is larger than the sum of its proper divisors (37288714).

42615656 is a wasteful number, since it uses less digits than its factorization.

42615656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326963 (or 5326959 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 42615656 is about 6528.0667888740. The cubic root of 42615656 is about 349.2928743553.

The spelling of 42615656 in words is "forty-two million, six hundred fifteen thousand, six hundred fifty-six".