253721260 has 96 divisors (see below), whose sum is σ = 613448640. Its totient is φ = 87318528.

The previous prime is 253721249. The next prime is 253721297. The reversal of 253721260 is 62127352.

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, 605331 + ... + 605749.

It is an arithmetic number, because the mean of its divisors is an integer number (6390090).

Almost surely, 2^253721260 is an apocalyptic number.

253721260 is a gapful number since it is divisible by the number (20) 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 253721260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306724320).

253721260 is an abundant number, since it is smaller than the sum of its proper divisors (359727380).

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

253721260 is a wasteful number, since it uses less digits than its factorization.

253721260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 253721260 is about 15928.6301984822. The cubic root of 253721260 is about 633.0708059360.

The spelling of 253721260 in words is "two hundred fifty-three million, seven hundred twenty-one thousand, two hundred sixty".