42755013 has 16 divisors (see below), whose sum is σ = 72389760. Its totient is φ = 24431328.

The previous prime is 42755003. The next prime is 42755033. The reversal of 42755013 is 31055724.

It is a happy number.

It is not a de Polignac number, because 42755013 - 2⁸ = 42754757 is a prime.

It is a super-2 number, since 2×42755013² = 3655982273260338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42755003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112920 + ... + 113297.

It is an arithmetic number, because the mean of its divisors is an integer number (4524360).

Almost surely, 2^42755013 is an apocalyptic number.

It is an amenable number.

42755013 is a deficient number, since it is larger than the sum of its proper divisors (29634747).

42755013 is a wasteful number, since it uses less digits than its factorization.

42755013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226233 (or 226227 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 42755013 is about 6538.7317577647. The cubic root of 42755013 is about 349.6731997185.

The spelling of 42755013 in words is "forty-two million, seven hundred fifty-five thousand, thirteen".