1279874120900 has 36 divisors (see below), whose sum is σ = 2808532781460. Its totient is φ = 506197401600.

The previous prime is 1279874120891. The next prime is 1279874120911. The reversal of 1279874120900 is 90214789721.

It can be written as a sum of positive squares in 6 ways, for example, as 123616934464 + 1156257186436 = 351592^2 + 1075294^2 .

It is a Harshad number since it is a multiple of its sum of digits (50).

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, 71894141 + ... + 71911940.

It is an arithmetic number, because the mean of its divisors is an integer number (78014799485).

Almost surely, 2^{1279874120900} is an apocalyptic number.

1279874120900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279874120900 is an abundant number, since it is smaller than the sum of its proper divisors (1528658660560).

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

1279874120900 is a wasteful number, since it uses less digits than its factorization.

1279874120900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143806184 (or 143806177 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 1279874120900 in words is "one trillion, two hundred seventy-nine billion, eight hundred seventy-four million, one hundred twenty thousand, nine hundred".