260000139 has 32 divisors (see below), whose sum is σ = 408913920. Its totient is φ = 143874432.

The previous prime is 260000137. The next prime is 260000141. The reversal of 260000139 is 931000062.

It is an interprime number because it is at equal distance from previous prime (260000137) and next prime (260000141).

It is not a de Polignac number, because 260000139 - 2¹ = 260000137 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (260000137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86449 + ... + 89405.

It is an arithmetic number, because the mean of its divisors is an integer number (12778560).

Almost surely, 2^260000139 is an apocalyptic number.

260000139 is a deficient number, since it is larger than the sum of its proper divisors (148913781).

260000139 is a wasteful number, since it uses less digits than its factorization.

260000139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3099.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 260000139 is about 16124.5198068036. The cubic root of 260000139 is about 638.2505436255.

The spelling of 260000139 in words is "two hundred sixty million, one hundred thirty-nine", and thus it is an aban number.