42557023 has 4 divisors (see below), whose sum is σ = 42607768. Its totient is φ = 42506280.

The previous prime is 42556999. The next prime is 42557051. The reversal of 42557023 is 32075524.

42557023 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42557023 - 2¹⁷ = 42425951 is a prime.

It is a super-2 number, since 2×42557023² = 3622200413245058, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42556982 and 42557000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42557323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24093 + ... + 25798.

It is an arithmetic number, because the mean of its divisors is an integer number (10651942).

Almost surely, 2^42557023 is an apocalyptic number.

42557023 is a deficient number, since it is larger than the sum of its proper divisors (50745).

42557023 is an equidigital number, since it uses as much as digits as its factorization.

42557023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50744.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 42557023 is about 6523.5744036533. The cubic root of 42557023 is about 349.1326086160.

The spelling of 42557023 in words is "forty-two million, five hundred fifty-seven thousand, twenty-three".