42365257 has 4 divisors (see below), whose sum is σ = 46216656. Its totient is φ = 38513860.

The previous prime is 42365243. The next prime is 42365261. The reversal of 42365257 is 75256324.

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 not a de Polignac number, because 42365257 - 2⁷ = 42365129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42365227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1925683 + ... + 1925704.

It is an arithmetic number, because the mean of its divisors is an integer number (11554164).

Almost surely, 2^42365257 is an apocalyptic number.

It is an amenable number.

42365257 is a deficient number, since it is larger than the sum of its proper divisors (3851399).

42365257 is a wasteful number, since it uses less digits than its factorization.

42365257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3851398.

The product of its digits is 50400, while the sum is 34.

The square root of 42365257 is about 6508.8598848032. The cubic root of 42365257 is about 348.6074106951.

The spelling of 42365257 in words is "forty-two million, three hundred sixty-five thousand, two hundred fifty-seven".