2505139 has 8 divisors (see below), whose sum is σ = 3083360. Its totient is φ = 1982016.

The previous prime is 2505133. The next prime is 2505143. The reversal of 2505139 is 9315052.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505139 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2505133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13674 + ... + 13855.

It is an arithmetic number, because the mean of its divisors is an integer number (385420).

2^2505139 is an apocalyptic number.

2505139 is a deficient number, since it is larger than the sum of its proper divisors (578221).

2505139 is a wasteful number, since it uses less digits than its factorization.

2505139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27549.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 2505139 is about 1582.7630902949. The cubic root of 2505139 is about 135.8138131291.

It can be divided in two parts, 2505 and 139, that multiplied together give a triangular number (348195 = T₈₃₄).

The spelling of 2505139 in words is "two million, five hundred five thousand, one hundred thirty-nine".