1275672792 has 64 divisors (see below), whose sum is σ = 3381626880. Its totient is φ = 399636992.

The previous prime is 1275672779. The next prime is 1275672823. The reversal of 1275672792 is 2972765721.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350293 + ... + 353915.

It is an arithmetic number, because the mean of its divisors is an integer number (52837920).

Almost surely, 2^1275672792 is an apocalyptic number.

1275672792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1275672792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690813440).

1275672792 is an abundant number, since it is smaller than the sum of its proper divisors (2105954088).

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

1275672792 is a wasteful number, since it uses less digits than its factorization.

1275672792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 4508 counting only the distinct ones).

The product of its digits is 740880, while the sum is 48.

The square root of 1275672792 is about 35716.5618726103. The cubic root of 1275672792 is about 1084.5421392765.

The spelling of 1275672792 in words is "one billion, two hundred seventy-five million, six hundred seventy-two thousand, seven hundred ninety-two".