5251440 has 40 divisors (see below), whose sum is σ = 16280208. Its totient is φ = 1400320.

The previous prime is 5251423. The next prime is 5251457. The reversal of 5251440 is 441525.

It is an interprime number because it is at equal distance from previous prime (5251423) and next prime (5251457).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10701 + ... + 11180.

Almost surely, 2^5251440 is an apocalyptic number.

It is an amenable number.

5251440 is an abundant number, since it is smaller than the sum of its proper divisors (11028768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5251440 is a wasteful number, since it uses less digits than its factorization.

5251440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21897 (or 21891 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 5251440 is about 2291.6020596954. The cubic root of 5251440 is about 173.8172211992.

Adding to 5251440 its reverse (441525), we get a palindrome (5692965).

The spelling of 5251440 in words is "five million, two hundred fifty-one thousand, four hundred forty".