253670321 has 8 divisors (see below), whose sum is σ = 260440488. Its totient is φ = 246928000.

The previous prime is 253670297. The next prime is 253670369. The reversal of 253670321 is 123076352.

It can be written as a sum of positive squares in 4 ways, for example, as 20802721 + 232867600 = 4561^2 + 15260^2 .

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 253670321 - 2¹⁴ = 253653937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253670371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12191 + ... + 25611.

It is an arithmetic number, because the mean of its divisors is an integer number (32555061).

Almost surely, 2^253670321 is an apocalyptic number.

It is an amenable number.

253670321 is a deficient number, since it is larger than the sum of its proper divisors (6770167).

253670321 is a wasteful number, since it uses less digits than its factorization.

253670321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13923.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 253670321 is about 15927.0311420553. The cubic root of 253670321 is about 633.0284364053.

The spelling of 253670321 in words is "two hundred fifty-three million, six hundred seventy thousand, three hundred twenty-one".