253725321 has 8 divisors (see below), whose sum is σ = 349966080. Its totient is φ = 163317392.

The previous prime is 253725313. The next prime is 253725331. The reversal of 253725321 is 123527352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 253725321 - 2³ = 253725313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253725301) 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, 1458105 + ... + 1458278.

It is an arithmetic number, because the mean of its divisors is an integer number (43745760).

Almost surely, 2^253725321 is an apocalyptic number.

It is an amenable number.

253725321 is a deficient number, since it is larger than the sum of its proper divisors (96240759).

253725321 is a wasteful number, since it uses less digits than its factorization.

253725321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916415.

The product of its digits is 12600, while the sum is 30.

The square root of 253725321 is about 15928.7576728381. The cubic root of 253725321 is about 633.0741835098.

The spelling of 253725321 in words is "two hundred fifty-three million, seven hundred twenty-five thousand, three hundred twenty-one".