1273500965025 has 81 divisors (see below), whose sum is σ = 2385195916467. Its totient is φ = 649471442400.

The previous prime is 1273500964999. The next prime is 1273500965057. The reversal of 1273500965025 is 5205690053721.

The square root of 1273500965025 is 1128495.

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

1273500965025 is a `hidden beast` number, since 1 + 2 + 7 + 3 + 50 + 0 + 96 + 502 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 458460347409 + 815040617616 = 677097^2 + 902796^2 .

It is not a de Polignac number, because 1273500965025 - 2²¹ = 1273498867873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 389329140 + ... + 389332410.

Almost surely, 2^{1273500965025} is an apocalyptic number.

1273500965025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1273500965025 is the 1128495-th square number.

1273500965025 is the 564248-th centered octagonal number.

It is an amenable number.

1273500965025 is a deficient number, since it is larger than the sum of its proper divisors (1111694951442).

1273500965025 is an frugal number, since it uses more digits than its factorization.

1273500965025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604 (or 3302 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 1273500965025 in words is "one trillion, two hundred seventy-three billion, five hundred million, nine hundred sixty-five thousand, twenty-five".