1251424540 has 12 divisors (see below), whose sum is σ = 2627991576. Its totient is φ = 500569808.

The previous prime is 1251424511. The next prime is 1251424567. The reversal of 1251424540 is 454241521.

It is a junction number, because it is equal to n+sod(n) for n = 1251424499 and 1251424508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31285594 + ... + 31285633.

It is an arithmetic number, because the mean of its divisors is an integer number (218999298).

Almost surely, 2^1251424540 is an apocalyptic number.

1251424540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251424540 is an abundant number, since it is smaller than the sum of its proper divisors (1376567036).

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

1251424540 is a wasteful number, since it uses less digits than its factorization.

1251424540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62571236 (or 62571234 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1251424540 is about 35375.4793607097. The cubic root of 1251424540 is about 1077.6264001170.

The spelling of 1251424540 in words is "one billion, two hundred fifty-one million, four hundred twenty-four thousand, five hundred forty".