1251550514140 has 48 divisors (see below), whose sum is σ = 2694983895072. Its totient is φ = 488064208896.

The previous prime is 1251550514111. The next prime is 1251550514147. The reversal of 1251550514140 is 414150551521.

It is a junction number, because it is equal to n+sod(n) for n = 1251550514096 and 1251550514105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251550514147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4684417 + ... + 4944376.

It is an arithmetic number, because the mean of its divisors is an integer number (56145497814).

Almost surely, 2^{1251550514140} is an apocalyptic number.

1251550514140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251550514140 is an abundant number, since it is smaller than the sum of its proper divisors (1443433380932).

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

1251550514140 is a wasteful number, since it uses less digits than its factorization.

1251550514140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9628966 (or 9628964 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 34.

The spelling of 1251550514140 in words is "one trillion, two hundred fifty-one billion, five hundred fifty million, five hundred fourteen thousand, one hundred forty".