1278412925972 has 48 divisors (see below), whose sum is σ = 2754451002240. Its totient is φ = 505571974272.

The previous prime is 1278412925971. The next prime is 1278412925983. The reversal of 1278412925972 is 2795292148721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278412925971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 459779 + ... + 1663797.

It is an arithmetic number, because the mean of its divisors is an integer number (57384395880).

Almost surely, 2^{1278412925972} is an apocalyptic number.

It is an amenable number.

1278412925972 is an abundant number, since it is smaller than the sum of its proper divisors (1476038076268).

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

1278412925972 is a wasteful number, since it uses less digits than its factorization.

1278412925972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206960 (or 1206958 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 59.

The spelling of 1278412925972 in words is "one trillion, two hundred seventy-eight billion, four hundred twelve million, nine hundred twenty-five thousand, nine hundred seventy-two".