253850721 has 8 divisors (see below), whose sum is σ = 346723104. Its totient is φ = 165106080.

The previous prime is 253850699. The next prime is 253850741. The reversal of 253850721 is 127058352.

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

It is not a de Polignac number, because 253850721 - 2⁵ = 253850689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253850741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1031791 + ... + 1032036.

It is an arithmetic number, because the mean of its divisors is an integer number (43340388).

Almost surely, 2^253850721 is an apocalyptic number.

It is an amenable number.

253850721 is a deficient number, since it is larger than the sum of its proper divisors (92872383).

253850721 is a wasteful number, since it uses less digits than its factorization.

253850721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063871.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 253850721 is about 15932.6934634418. The cubic root of 253850721 is about 633.1784621935.

The spelling of 253850721 in words is "two hundred fifty-three million, eight hundred fifty thousand, seven hundred twenty-one".