253040 has 20 divisors (see below), whose sum is σ = 588504. Its totient is φ = 101184.

The previous prime is 253013. The next prime is 253049. The reversal of 253040 is 40352.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502 + ... + 1661.

2²⁵³⁰⁴⁰ is an apocalyptic number.

253040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253040 is an abundant number, since it is smaller than the sum of its proper divisors (335464).

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

253040 is a wasteful number, since it uses less digits than its factorization.

253040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176 (or 3170 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 253040 is about 503.0308141655. The cubic root of 253040 is about 63.2503684356.

Adding to 253040 its reverse (40352), we get a palindrome (293392).

The spelling of 253040 in words is "two hundred fifty-three thousand, forty".