2600139 has 4 divisors (see below), whose sum is σ = 3466856. Its totient is φ = 1733424.

The previous prime is 2600137. The next prime is 2600161. The reversal of 2600139 is 9310062.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2600139 - 2¹ = 2600137 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2600137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433354 + ... + 433359.

It is an arithmetic number, because the mean of its divisors is an integer number (866714).

2^2600139 is an apocalyptic number.

2600139 is a deficient number, since it is larger than the sum of its proper divisors (866717).

2600139 is an equidigital number, since it uses as much as digits as its factorization.

2600139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866716.

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

The square root of 2600139 is about 1612.4946511539. The cubic root of 2600139 is about 137.5093371070.

The spelling of 2600139 in words is "two million, six hundred thousand, one hundred thirty-nine".