42011656 has 8 divisors (see below), whose sum is σ = 78771870. Its totient is φ = 21005824.

The previous prime is 42011621. The next prime is 42011663. The reversal of 42011656 is 65611024.

It can be written as a sum of positive squares in only one way, i.e., 41809156 + 202500 = 6466^2 + 450^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 42011656.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625721 + ... + 2625736.

Almost surely, 2^42011656 is an apocalyptic number.

It is an amenable number.

42011656 is a deficient number, since it is larger than the sum of its proper divisors (36760214).

42011656 is a wasteful number, since it uses less digits than its factorization.

42011656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5251463 (or 5251459 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 42011656 is about 6481.6399159472. The cubic root of 42011656 is about 347.6348175196.

The spelling of 42011656 in words is "forty-two million, eleven thousand, six hundred fifty-six".