253851121 has 4 divisors (see below), whose sum is σ = 253883812. Its totient is φ = 253818432.

The previous prime is 253851071. The next prime is 253851127. The reversal of 253851121 is 121158352.

It is the 6505-th star number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 98724096 + 155127025 = 9936^2 + 12455^2 .

It is a cyclic number.

It is not a de Polignac number, because 253851121 - 2¹⁹ = 253326833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 253851121.

It is not an unprimeable number, because it can be changed into a prime (253851127) 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, 2701 + ... + 22693.

It is an arithmetic number, because the mean of its divisors is an integer number (63470953).

Almost surely, 2^253851121 is an apocalyptic number.

It is an amenable number.

253851121 is a deficient number, since it is larger than the sum of its proper divisors (32691).

253851121 is a wasteful number, since it uses less digits than its factorization.

253851121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32690.

The product of its digits is 2400, while the sum is 28.

The square root of 253851121 is about 15932.7060162422. The cubic root of 253851121 is about 633.1787947659.

The spelling of 253851121 in words is "two hundred fifty-three million, eight hundred fifty-one thousand, one hundred twenty-one".