1251301540 has 48 divisors (see below), whose sum is σ = 2704826880. Its totient is φ = 486046080.

The previous prime is 1251301537. The next prime is 1251301573. The reversal of 1251301540 is 451031521.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 89889 + ... + 102871.

It is an arithmetic number, because the mean of its divisors is an integer number (56350560).

Almost surely, 2^1251301540 is an apocalyptic number.

1251301540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251301540 is an abundant number, since it is smaller than the sum of its proper divisors (1453525340).

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

1251301540 is a wasteful number, since it uses less digits than its factorization.

1251301540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13132 (or 13130 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1251301540 is about 35373.7408256464. The cubic root of 1251301540 is about 1077.5910930500.

The spelling of 1251301540 in words is "one billion, two hundred fifty-one million, three hundred one thousand, five hundred forty".