1252926780 has 96 divisors (see below), whose sum is σ = 4021387776. Its totient is φ = 285524736.

The previous prime is 1252926767. The next prime is 1252926791. The reversal of 1252926780 is 876292521.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141442 + ... + 150038.

It is an arithmetic number, because the mean of its divisors is an integer number (41889456).

Almost surely, 2^1252926780 is an apocalyptic number.

1252926780 is a gapful number since it is divisible by the number (10) 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 1252926780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010693888).

1252926780 is an abundant number, since it is smaller than the sum of its proper divisors (2768460996).

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

1252926780 is a wasteful number, since it uses less digits than its factorization.

1252926780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8963 (or 8961 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1252926780 is about 35396.7057789281. The cubic root of 1252926780 is about 1078.0574305395.

The spelling of 1252926780 in words is "one billion, two hundred fifty-two million, nine hundred twenty-six thousand, seven hundred eighty".