253569121 has 6 divisors (see below), whose sum is σ = 274575030. Its totient is φ = 234063648.

The previous prime is 253569101. The next prime is 253569139. The reversal of 253569121 is 121965352.

It can be written as a sum of positive squares in 3 ways, for example, as 8208225 + 245360896 = 2865^2 + 15664^2 .

It is not a de Polignac number, because 253569121 - 2¹³ = 253560929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253569101) 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 5 ways as a sum of consecutive naturals, for example, 750036 + ... + 750373.

It is an arithmetic number, because the mean of its divisors is an integer number (45762505).

Almost surely, 2^253569121 is an apocalyptic number.

It is an amenable number.

253569121 is a deficient number, since it is larger than the sum of its proper divisors (21005909).

253569121 is a wasteful number, since it uses less digits than its factorization.

253569121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500435 (or 1500422 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The square root of 253569121 is about 15923.8538363048. The cubic root of 253569121 is about 632.9442444529.

The spelling of 253569121 in words is "two hundred fifty-three million, five hundred sixty-nine thousand, one hundred twenty-one".