42756424 has 8 divisors (see below), whose sum is σ = 80168310. Its totient is φ = 21378208.

The previous prime is 42756391. The next prime is 42756437. The reversal of 42756424 is 42465724.

It can be written as a sum of positive squares in only one way, i.e., 23833924 + 18922500 = 4882^2 + 4350^2 .

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

It is a super-2 number, since 2×42756424² = 3656223586535552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42756424.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2672269 + ... + 2672284.

Almost surely, 2^42756424 is an apocalyptic number.

It is an amenable number.

42756424 is a deficient number, since it is larger than the sum of its proper divisors (37411886).

42756424 is a wasteful number, since it uses less digits than its factorization.

42756424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5344559 (or 5344555 counting only the distinct ones).

The product of its digits is 53760, while the sum is 34.

The square root of 42756424 is about 6538.8396524154. The cubic root of 42756424 is about 349.6770463120.

The spelling of 42756424 in words is "forty-two million, seven hundred fifty-six thousand, four hundred twenty-four".