1215362929225 has 27 divisors (see below), whose sum is σ = 1561014564213. Its totient is φ = 938639617440.

The previous prime is 1215362929213. The next prime is 1215362929241. The reversal of 1215362929225 is 5229292635121.

The square root of 1215362929225 is 1102435.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 16705821001 + 1198657108224 = 129251^2 + 1094832^2 .

It is not a de Polignac number, because 1215362929225 - 2³⁷ = 1077923975753 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 159849274 + ... + 159856876.

Almost surely, 2^{1215362929225} is an apocalyptic number.

1215362929225 is the 1102435-th square number.

1215362929225 is the 551218-th centered octagonal number.

It is an amenable number.

1215362929225 is a deficient number, since it is larger than the sum of its proper divisors (345651634988).

1215362929225 is an frugal number, since it uses more digits than its factorization.

1215362929225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15274 (or 7637 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 49.

Multiplying 1215362929225 by its sum of digits (49), we get a square (59552783532025 = 7717045²).

The spelling of 1215362929225 in words is "one trillion, two hundred fifteen billion, three hundred sixty-two million, nine hundred twenty-nine thousand, two hundred twenty-five".