6455439 has 6 divisors (see below), whose sum is σ = 9324536. Its totient is φ = 4303620.

The previous prime is 6455431. The next prime is 6455441. The reversal of 6455439 is 9345546.

It is a happy number.

6455439 is a `hidden beast` number, since 645 + 5 + 4 + 3 + 9 = 666.

It is not a de Polignac number, because 6455439 - 2³ = 6455431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6455431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 358627 + ... + 358644.

Almost surely, 2^6455439 is an apocalyptic number.

6455439 is a deficient number, since it is larger than the sum of its proper divisors (2869097).

6455439 is a wasteful number, since it uses less digits than its factorization.

6455439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717277 (or 717274 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 6455439 is about 2540.7555962745. The cubic root of 6455439 is about 186.1981066484.

It can be divided in two parts, 645 and 5439, that added together give a square (6084 = 78²).

The spelling of 6455439 in words is "six million, four hundred fifty-five thousand, four hundred thirty-nine".