1275265138900 has 36 divisors (see below), whose sum is σ = 2767702486780. Its totient is φ = 510036537600.

The previous prime is 1275265138867. The next prime is 1275265139053. The reversal of 1275265138900 is 98315625721.

It can be written as a sum of positive squares in 6 ways, for example, as 172588731844 + 1102676407056 = 415438^2 + 1050084^2 .

It is a congruent 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, 128391 + ... + 1602190.

Almost surely, 2^{1275265138900} is an apocalyptic number.

1275265138900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275265138900 is an abundant number, since it is smaller than the sum of its proper divisors (1492437347880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1275265138900 is a wasteful number, since it uses less digits than its factorization.

1275265138900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737964 (or 1737957 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 1275265138900 in words is "one trillion, two hundred seventy-five billion, two hundred sixty-five million, one hundred thirty-eight thousand, nine hundred".