42642255 has 16 divisors (see below), whose sum is σ = 69892704. Its totient is φ = 22187520.

The previous prime is 42642247. The next prime is 42642269. The reversal of 42642255 is 55224624.

It is a happy number.

It is not a de Polignac number, because 42642255 - 2³ = 42642247 is a prime.

It is a super-2 number, since 2×42642255² = 3636723822970050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34054 + ... + 35283.

It is an arithmetic number, because the mean of its divisors is an integer number (4368294).

Almost surely, 2^42642255 is an apocalyptic number.

42642255 is a deficient number, since it is larger than the sum of its proper divisors (27250449).

42642255 is a wasteful number, since it uses less digits than its factorization.

42642255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69386.

The product of its digits is 19200, while the sum is 30.

The square root of 42642255 is about 6530.1037510900. The cubic root of 42642255 is about 349.3655308210.

Adding to 42642255 its reverse (55224624), we get a palindrome (97866879).

The spelling of 42642255 in words is "forty-two million, six hundred forty-two thousand, two hundred fifty-five".