42641556 has 12 divisors (see below), whose sum is σ = 99496992. Its totient is φ = 14213848.

The previous prime is 42641537. The next prime is 42641561. The reversal of 42641556 is 65514624.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×42641556² = 3636604596202272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776720 + ... + 1776743.

It is an arithmetic number, because the mean of its divisors is an integer number (8291416).

Almost surely, 2^42641556 is an apocalyptic number.

It is an amenable number.

42641556 is an abundant number, since it is smaller than the sum of its proper divisors (56855436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42641556 is a wasteful number, since it uses less digits than its factorization.

42641556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553470 (or 3553468 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 42641556 is about 6530.0502295158. The cubic root of 42641556 is about 349.3636218550.

The spelling of 42641556 in words is "forty-two million, six hundred forty-one thousand, five hundred fifty-six".