1266375025 has 12 divisors (see below), whose sum is σ = 1570797900. Its totient is φ = 1012782080.

The previous prime is 1266374969. The next prime is 1266375043. The reversal of 1266375025 is 5205736621.

It can be written as a sum of positive squares in 6 ways, for example, as 336795904 + 929579121 = 18352^2 + 30489^2 .

It is not a de Polignac number, because 1266375025 - 2⁹ = 1266374513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104481 + ... + 115969.

It is an arithmetic number, because the mean of its divisors is an integer number (130899825).

Almost surely, 2^1266375025 is an apocalyptic number.

It is an amenable number.

1266375025 is a deficient number, since it is larger than the sum of its proper divisors (304422875).

1266375025 is a wasteful number, since it uses less digits than its factorization.

1266375025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15908 (or 15903 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 1266375025 is about 35586.1633925322. The cubic root of 1266375025 is about 1081.9008092611.

The spelling of 1266375025 in words is "one billion, two hundred sixty-six million, three hundred seventy-five thousand, twenty-five".