42579257 has 4 divisors (see below), whose sum is σ = 48662016. Its totient is φ = 36496500.

The previous prime is 42579253. The next prime is 42579263. The reversal of 42579257 is 75297524.

42579257 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 42579257 - 2² = 42579253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42579253) 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, 3041369 + ... + 3041382.

It is an arithmetic number, because the mean of its divisors is an integer number (12165504).

Almost surely, 2^42579257 is an apocalyptic number.

It is an amenable number.

42579257 is a deficient number, since it is larger than the sum of its proper divisors (6082759).

42579257 is an equidigital number, since it uses as much as digits as its factorization.

42579257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6082758.

The product of its digits is 176400, while the sum is 41.

The square root of 42579257 is about 6525.2783082410. The cubic root of 42579257 is about 349.1933997021.

The spelling of 42579257 in words is "forty-two million, five hundred seventy-nine thousand, two hundred fifty-seven".