253740 has 24 divisors (see below), whose sum is σ = 710640. Its totient is φ = 67648.

The previous prime is 253733. The next prime is 253741. The reversal of 253740 is 47352.

It is a happy number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 253740.

It is not an unprimeable number, because it can be changed into a prime (253741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (29610).

2²⁵³⁷⁴⁰ is an apocalyptic number.

253740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253740 is an abundant number, since it is smaller than the sum of its proper divisors (456900).

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

253740 is a wasteful number, since it uses less digits than its factorization.

253740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4241 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 253740 is about 503.7261160591. The cubic root of 253740 is about 63.3086391878.

The spelling of 253740 in words is "two hundred fifty-three thousand, seven hundred forty".