42639255 has 12 divisors (see below), whose sum is σ = 73908120. Its totient is φ = 22740912.

The previous prime is 42639253. The next prime is 42639257. The reversal of 42639255 is 55293624.

It is an interprime number because it is at equal distance from previous prime (42639253) and next prime (42639257).

It is not a de Polignac number, because 42639255 - 2¹ = 42639253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42639253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 473725 + ... + 473814.

It is an arithmetic number, because the mean of its divisors is an integer number (6159010).

Almost surely, 2^42639255 is an apocalyptic number.

42639255 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42639255 is a deficient number, since it is larger than the sum of its proper divisors (31268865).

42639255 is a wasteful number, since it uses less digits than its factorization.

42639255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947550 (or 947547 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 42639255 is about 6529.8740416642. The cubic root of 42639255 is about 349.3573376866.

The spelling of 42639255 in words is "forty-two million, six hundred thirty-nine thousand, two hundred fifty-five".