1199491521925 has 12 divisors (see below), whose sum is σ = 1487781270820. Its totient is φ = 959327550720.

The previous prime is 1199491521817. The next prime is 1199491521929. The reversal of 1199491521925 is 5291251949911.

It can be written as a sum of positive squares in 6 ways, for example, as 612824374561 + 586667147364 = 782831^2 + 765942^2 .

It is not a de Polignac number, because 1199491521925 - 2²¹ = 1199489424773 is a prime.

It is a super-2 number, since 2×1199491521925² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1199491521925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199491521929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6549540 + ... + 6730189.

Almost surely, 2^{1199491521925} is an apocalyptic number.

It is an amenable number.

1199491521925 is a deficient number, since it is larger than the sum of its proper divisors (288289748895).

1199491521925 is a wasteful number, since it uses less digits than its factorization.

1199491521925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13283352 (or 13283347 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 58.

The spelling of 1199491521925 in words is "one trillion, one hundred ninety-nine billion, four hundred ninety-one million, five hundred twenty-one thousand, nine hundred twenty-five".