6251540 has 24 divisors (see below), whose sum is σ = 13192872. Its totient is φ = 2488320.

The previous prime is 6251537. The next prime is 6251543. The reversal of 6251540 is 451526.

It is an interprime number because it is at equal distance from previous prime (6251537) and next prime (6251543).

It can be written as a sum of positive squares in 4 ways, for example, as 3334276 + 2917264 = 1826^2 + 1708^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6251543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4172 + ... + 5468.

It is an arithmetic number, because the mean of its divisors is an integer number (549703).

Almost surely, 2^6251540 is an apocalyptic number.

It is an amenable number.

6251540 is an abundant number, since it is smaller than the sum of its proper divisors (6941332).

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

6251540 is a wasteful number, since it uses less digits than its factorization.

6251540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547 (or 1545 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 6251540 is about 2500.3079810295. The cubic root of 6251540 is about 184.2167027789.

The spelling of 6251540 in words is "six million, two hundred fifty-one thousand, five hundred forty".