253403261 has 2 divisors, whose sum is σ = 253403262. Its totient is φ = 253403260.

The previous prime is 253403237. The next prime is 253403327. The reversal of 253403261 is 162304352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228463225 + 24940036 = 15115^2 + 4994^2 .

It is a cyclic number.

It is not a de Polignac number, because 253403261 - 2⁶ = 253403197 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 253403261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253403561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126701630 + 126701631.

It is an arithmetic number, because the mean of its divisors is an integer number (126701631).

Almost surely, 2^253403261 is an apocalyptic number.

It is an amenable number.

253403261 is a deficient number, since it is larger than the sum of its proper divisors (1).

253403261 is an equidigital number, since it uses as much as digits as its factorization.

253403261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 253403261 is about 15918.6450742518. The cubic root of 253403261 is about 632.8062110447.

The spelling of 253403261 in words is "two hundred fifty-three million, four hundred three thousand, two hundred sixty-one".