42041556 has 18 divisors (see below), whose sum is σ = 106271802. Its totient is φ = 14013840.

The previous prime is 42041543. The next prime is 42041557. The reversal of 42041556 is 65514024.

It can be written as a sum of positive squares in only one way, i.e., 25100100 + 16941456 = 5010^2 + 4116^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×42041556² = 3534984861802272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42041557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 583875 + ... + 583946.

It is an arithmetic number, because the mean of its divisors is an integer number (5903989).

Almost surely, 2^42041556 is an apocalyptic number.

It is an amenable number.

42041556 is an abundant number, since it is smaller than the sum of its proper divisors (64230246).

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

42041556 is a wasteful number, since it uses less digits than its factorization.

42041556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167831 (or 1167826 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 42041556 is about 6483.9460207500. The cubic root of 42041556 is about 347.7172693684.

The spelling of 42041556 in words is "forty-two million, forty-one thousand, five hundred fifty-six".