1252717280 has 96 divisors (see below), whose sum is σ = 3102932448. Its totient is φ = 477388800.

The previous prime is 1252717261. The next prime is 1252717307. The reversal of 1252717280 is 827172521.

It is a super-2 number, since 2×1252717280² = 3138601167221196800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1252717280.

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, 279860 + ... + 284300.

It is an arithmetic number, because the mean of its divisors is an integer number (32322213).

Almost surely, 2^1252717280 is an apocalyptic number.

1252717280 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 1252717280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551466224).

1252717280 is an abundant number, since it is smaller than the sum of its proper divisors (1850215168).

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

1252717280 is a wasteful number, since it uses less digits than its factorization.

1252717280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540 (or 4532 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 1252717280 is about 35393.7463402788. The cubic root of 1252717280 is about 1077.9973404037.

The spelling of 1252717280 in words is "one billion, two hundred fifty-two million, seven hundred seventeen thousand, two hundred eighty".