2405139 has 8 divisors (see below), whose sum is σ = 3498432. Its totient is φ = 1457640.

The previous prime is 2405107. The next prime is 2405141. The reversal of 2405139 is 9315042.

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

It is not a de Polignac number, because 2405139 - 2⁵ = 2405107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2405149) 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, 36409 + ... + 36474.

It is an arithmetic number, because the mean of its divisors is an integer number (437304).

2^2405139 is an apocalyptic number.

2405139 is a deficient number, since it is larger than the sum of its proper divisors (1093293).

2405139 is a wasteful number, since it uses less digits than its factorization.

2405139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72897.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 2405139 is about 1550.8510566782. The cubic root of 2405139 is about 133.9820834440.

Subtracting 2405139 from its reverse (9315042), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 24051 and 39, that added together give a triangular number (24090 = T₂₁₉).

The spelling of 2405139 in words is "two million, four hundred five thousand, one hundred thirty-nine".