1266351025 has 12 divisors (see below), whose sum is σ = 1570757104. Its totient is φ = 1012770000.

The previous prime is 1266351019. The next prime is 1266351059. The reversal of 1266351025 is 5201536621.

It is not a de Polignac number, because 1266351025 - 2¹⁵ = 1266318257 is a prime.

It is a Duffinian number.

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, 110830 + ... + 121720.

Almost surely, 2^1266351025 is an apocalyptic number.

It is an amenable number.

1266351025 is a deficient number, since it is larger than the sum of its proper divisors (304406079).

1266351025 is a wasteful number, since it uses less digits than its factorization.

1266351025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15552 (or 15547 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1266351025 is about 35585.8261812200. The cubic root of 1266351025 is about 1081.8939745866.

Adding to 1266351025 its reverse (5201536621), we get a palindrome (6467887646).

The spelling of 1266351025 in words is "one billion, two hundred sixty-six million, three hundred fifty-one thousand, twenty-five".