139626285 has 16 divisors (see below), whose sum is σ = 225573504. Its totient is φ = 73743552.

The previous prime is 139626283. The next prime is 139626299. The reversal of 139626285 is 582626931.

It is not a de Polignac number, because 139626285 - 2¹ = 139626283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139626281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43642 + ... + 46731.

It is an arithmetic number, because the mean of its divisors is an integer number (14098344).

Almost surely, 2^139626285 is an apocalyptic number.

139626285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139626285 is a deficient number, since it is larger than the sum of its proper divisors (85947219).

139626285 is a wasteful number, since it uses less digits than its factorization.

139626285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90484.

The product of its digits is 155520, while the sum is 42.

The square root of 139626285 is about 11816.3566720034. The cubic root of 139626285 is about 518.7869715750.

The spelling of 139626285 in words is "one hundred thirty-nine million, six hundred twenty-six thousand, two hundred eighty-five".