2455139 has 4 divisors (see below), whose sum is σ = 2507424. Its totient is φ = 2402856.

The previous prime is 2455133. The next prime is 2455147. The reversal of 2455139 is 9315542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9315542 = 2 ⋅4657771.

It is a cyclic number.

It is not a de Polignac number, because 2455139 - 2⁸ = 2454883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2455133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26072 + ... + 26165.

It is an arithmetic number, because the mean of its divisors is an integer number (626856).

2^2455139 is an apocalyptic number.

2455139 is a deficient number, since it is larger than the sum of its proper divisors (52285).

2455139 is an equidigital number, since it uses as much as digits as its factorization.

2455139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52284.

The product of its digits is 5400, while the sum is 29.

The square root of 2455139 is about 1566.8883176538. Note that the first 3 decimals coincide. The cubic root of 2455139 is about 134.9041660961.

The spelling of 2455139 in words is "two million, four hundred fifty-five thousand, one hundred thirty-nine".