253730 has 8 divisors (see below), whose sum is σ = 456732. Its totient is φ = 101488.

The previous prime is 253717. The next prime is 253733. The reversal of 253730 is 37352.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 41209 = 461^2 + 203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12677 + ... + 12696.

2²⁵³⁷³⁰ is an apocalyptic number.

253730 is a deficient number, since it is larger than the sum of its proper divisors (203002).

253730 is a wasteful number, since it uses less digits than its factorization.

253730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25380.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 253730 is about 503.7161899324. The cubic root of 253730 is about 63.3078075036.

The spelling of 253730 in words is "two hundred fifty-three thousand, seven hundred thirty".