2553439 has 18 divisors (see below), whose sum is σ = 3142752. Its totient is φ = 2066400.

The previous prime is 2553433. The next prime is 2553457. The reversal of 2553439 is 9343552.

It is not a de Polignac number, because 2553439 - 2³ = 2553431 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a d-powerful number, because it can be written as 2⁷ + 5⁵ + 5⁹ + 3 + 4⁸ + 3¹² + 9² .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2553439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 62259 + ... + 62299.

2^2553439 is an apocalyptic number.

2553439 is a deficient number, since it is larger than the sum of its proper divisors (589313).

2553439 is an equidigital number, since it uses as much as digits as its factorization.

2553439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 79 counting only the distinct ones).

The product of its digits is 16200, while the sum is 31.

The square root of 2553439 is about 1597.9483721322. The cubic root of 2553439 is about 136.6811095847.

Multiplying 2553439 by its sum of digits (31), we get a square (79156609 = 8897²).

2553439 divided by its sum of digits (31) gives a square (82369 = 287²).

It can be divided in two parts, 2553 and 439, that added together give a palindrome (2992).

The spelling of 2553439 in words is "two million, five hundred fifty-three thousand, four hundred thirty-nine".