1252555320 has 64 divisors (see below), whose sum is σ = 3774597120. Its totient is φ = 332509824.

The previous prime is 1252555301. The next prime is 1252555331. The reversal of 1252555320 is 235552521.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 3357 + ... + 50163.

It is an arithmetic number, because the mean of its divisors is an integer number (58978080).

Almost surely, 2^1252555320 is an apocalyptic number.

1252555320 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 1252555320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1887298560).

1252555320 is an abundant number, since it is smaller than the sum of its proper divisors (2522041800).

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

1252555320 is a wasteful number, since it uses less digits than its factorization.

1252555320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47044 (or 47040 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 1252555320 is about 35391.4582915144. The cubic root of 1252555320 is about 1077.9508814043.

The spelling of 1252555320 in words is "one billion, two hundred fifty-two million, five hundred fifty-five thousand, three hundred twenty".