1251125624 has 48 divisors (see below), whose sum is σ = 2734187400. Its totient is φ = 535149888.

The previous prime is 1251125567. The next prime is 1251125647. The reversal of 1251125624 is 4265211521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217862 + ... + 223530.

Almost surely, 2^1251125624 is an apocalyptic number.

1251125624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251125624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367093700).

1251125624 is an abundant number, since it is smaller than the sum of its proper divisors (1483061776).

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

1251125624 is a wasteful number, since it uses less digits than its factorization.

1251125624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6252 (or 6241 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 1251125624 is about 35371.2542045091. The cubic root of 1251125624 is about 1077.5405924598.

The spelling of 1251125624 in words is "one billion, two hundred fifty-one million, one hundred twenty-five thousand, six hundred twenty-four".