253651 has 2 divisors, whose sum is σ = 253652. Its totient is φ = 253650.

The previous prime is 253639. The next prime is 253661. The reversal of 253651 is 156352.

It is a happy number.

253651 is nontrivially palindromic in base 13 and base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253651 - 2¹⁷ = 122579 is a prime.

It is a Chen prime.

253651 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (253601) 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 as a sum of consecutive naturals, namely, 126825 + 126826.

It is an arithmetic number, because the mean of its divisors is an integer number (126826).

2²⁵³⁶⁵¹ is an apocalyptic number.

253651 is a deficient number, since it is larger than the sum of its proper divisors (1).

253651 is an equidigital number, since it uses as much as digits as its factorization.

253651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 22.

The square root of 253651 is about 503.6377666538. The cubic root of 253651 is about 63.3012364294.

The spelling of 253651 in words is "two hundred fifty-three thousand, six hundred fifty-one".