1251552140 has 12 divisors (see below), whose sum is σ = 2628259536. Its totient is φ = 500620848.

The previous prime is 1251552089. The next prime is 1251552149. The reversal of 1251552140 is 412551521.

1251552140 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1251552149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31288784 + ... + 31288823.

It is an arithmetic number, because the mean of its divisors is an integer number (219021628).

Almost surely, 2^1251552140 is an apocalyptic number.

1251552140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251552140 is an abundant number, since it is smaller than the sum of its proper divisors (1376707396).

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

1251552140 is a wasteful number, since it uses less digits than its factorization.

1251552140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62577616 (or 62577614 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1251552140 is about 35377.2828238688. The cubic root of 1251552140 is about 1077.6630251660.

The spelling of 1251552140 in words is "one billion, two hundred fifty-one million, five hundred fifty-two thousand, one hundred forty".