6251440 has 40 divisors (see below), whose sum is σ = 15655248. Its totient is φ = 2307840.

The previous prime is 6251431. The next prime is 6251459. The reversal of 6251440 is 441526.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966 + ... + 4045.

Almost surely, 2^6251440 is an apocalyptic number.

It is an amenable number.

6251440 is an abundant number, since it is smaller than the sum of its proper divisors (9403808).

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

6251440 is a wasteful number, since it uses less digits than its factorization.

6251440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037 (or 6031 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 6251440 is about 2500.2879834131. The cubic root of 6251440 is about 184.2157205266.

Adding to 6251440 its reverse (441526), we get a palindrome (6692966).

The spelling of 6251440 in words is "six million, two hundred fifty-one thousand, four hundred forty".