42556837 has 4 divisors (see below), whose sum is σ = 42572736. Its totient is φ = 42540940.

The previous prime is 42556823. The next prime is 42556841. The reversal of 42556837 is 73865524.

42556837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42556837 - 2²³ = 34168229 is a prime.

It is a super-2 number, since 2×42556837² = 3622168750889138, which contains 22 as substring.

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 42556837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42556847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2839 + ... + 9652.

It is an arithmetic number, because the mean of its divisors is an integer number (10643184).

Almost surely, 2^42556837 is an apocalyptic number.

It is an amenable number.

42556837 is a deficient number, since it is larger than the sum of its proper divisors (15899).

42556837 is a wasteful number, since it uses less digits than its factorization.

42556837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15898.

The product of its digits is 201600, while the sum is 40.

The square root of 42556837 is about 6523.5601476494. The cubic root of 42556837 is about 349.1320999749.

The spelling of 42556837 in words is "forty-two million, five hundred fifty-six thousand, eight hundred thirty-seven".