1275864652428 has 24 divisors (see below), whose sum is σ = 3057477456432. Its totient is φ = 413793941184.

The previous prime is 1275864652427. The next prime is 1275864652429. The reversal of 1275864652428 is 8242564685721.

It is an interprime number because it is at equal distance from previous prime (1275864652427) and next prime (1275864652429).

It is a super-2 number, since 2×1275864652428² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1275864652421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436784075 + ... + 1436784962.

It is an arithmetic number, because the mean of its divisors is an integer number (127394894018).

Almost surely, 2^{1275864652428} is an apocalyptic number.

It is an amenable number.

1275864652428 is an abundant number, since it is smaller than the sum of its proper divisors (1781612804004).

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

1275864652428 is a wasteful number, since it uses less digits than its factorization.

1275864652428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873569081 (or 2873569079 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 60.

The spelling of 1275864652428 in words is "one trillion, two hundred seventy-five billion, eight hundred sixty-four million, six hundred fifty-two thousand, four hundred twenty-eight".