253994121 has 12 divisors (see below), whose sum is σ = 367018548. Its totient is φ = 169265664.

The previous prime is 253994107. The next prime is 253994123. The reversal of 253994121 is 121499352.

It can be written as a sum of positive squares in 2 ways, for example, as 243360000 + 10634121 = 15600^2 + 3261^2 .

It is not a de Polignac number, because 253994121 - 2¹⁰ = 253993097 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (253994123) 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 11 ways as a sum of consecutive naturals, for example, 44401 + ... + 49793.

It is an arithmetic number, because the mean of its divisors is an integer number (30584879).

Almost surely, 2^253994121 is an apocalyptic number.

It is an amenable number.

253994121 is a deficient number, since it is larger than the sum of its proper divisors (113024427).

253994121 is a wasteful number, since it uses less digits than its factorization.

253994121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632 (or 10629 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 253994121 is about 15937.1930088080. The cubic root of 253994121 is about 633.2976670281.

The spelling of 253994121 in words is "two hundred fifty-three million, nine hundred ninety-four thousand, one hundred twenty-one".