1207921893025 has 81 divisors (see below), whose sum is σ = 1655815849779. Its totient is φ = 873933366240.

The previous prime is 1207921893007. The next prime is 1207921893041. The reversal of 1207921893025 is 5203981297021.

The square root of 1207921893025 is 1099055.

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

It can be written as a sum of positive squares in only one way, i.e., 434851881489 + 773070011536 = 659433^2 + 879244^2 .

It is not a de Polignac number, because 1207921893025 - 2⁵ = 1207921892993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1207921893025.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2401434924 + ... + 2401435426.

Almost surely, 2^{1207921893025} is an apocalyptic number.

1207921893025 is the 1099055-th square number.

1207921893025 is the 549528-th centered octagonal number.

It is an amenable number.

1207921893025 is a deficient number, since it is larger than the sum of its proper divisors (447893956754).

1207921893025 is an frugal number, since it uses more digits than its factorization.

1207921893025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

Multiplying 1207921893025 by its sum of digits (49), we get a square (59188172758225 = 7693385²).

The spelling of 1207921893025 in words is "one trillion, two hundred seven billion, nine hundred twenty-one million, eight hundred ninety-three thousand, twenty-five".