1251423222525 has 72 divisors (see below), whose sum is σ = 2561829990720. Its totient is φ = 572037534720.

The previous prime is 1251423222523. The next prime is 1251423222551. The reversal of 1251423222525 is 5252223241521.

1251423222525 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 423 + 2 + 225 + 2 + 5 = 666.

It is not a de Polignac number, because 1251423222525 - 2¹ = 1251423222523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251423222525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251423222523) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 35314266 + ... + 35349684.

Almost surely, 2^{1251423222525} is an apocalyptic number.

1251423222525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1251423222525 is an abundant number, since it is smaller than the sum of its proper divisors (1310406768195).

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

1251423222525 is a wasteful number, since it uses less digits than its factorization.

1251423222525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57875 (or 57867 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The spelling of 1251423222525 in words is "one trillion, two hundred fifty-one billion, four hundred twenty-three million, two hundred twenty-two thousand, five hundred twenty-five".