1266021362425 has 6 divisors (see below), whose sum is σ = 1569866489438. Its totient is φ = 1012817089920.

The previous prime is 1266021362393. The next prime is 1266021362429. The reversal of 1266021362425 is 5242631206621.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 139137206121 + 1126884156304 = 373011^2 + 1061548^2 .

It is not a de Polignac number, because 1266021362425 - 2⁵ = 1266021362393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266021362429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25320427224 + ... + 25320427273.

Almost surely, 2^{1266021362425} is an apocalyptic number.

It is an amenable number.

1266021362425 is a deficient number, since it is larger than the sum of its proper divisors (303845127013).

1266021362425 is an equidigital number, since it uses as much as digits as its factorization.

1266021362425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50640854507 (or 50640854502 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

The spelling of 1266021362425 in words is "one trillion, two hundred sixty-six billion, twenty-one million, three hundred sixty-two thousand, four hundred twenty-five".