253447 has 2 divisors, whose sum is σ = 253448. Its totient is φ = 253446.

The previous prime is 253439. The next prime is 253469. The reversal of 253447 is 744352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 253447 - 2³ = 253439 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126723 + 126724.

It is an arithmetic number, because the mean of its divisors is an integer number (126724).

2²⁵³⁴⁴⁷ is an apocalyptic number.

253447 is a deficient number, since it is larger than the sum of its proper divisors (1).

253447 is an equidigital number, since it uses as much as digits as its factorization.

253447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 25.

The square root of 253447 is about 503.4351994050. The cubic root of 253447 is about 63.2842617730.

Adding to 253447 its reverse (744352), we get a palindrome (997799).

The spelling of 253447 in words is "two hundred fifty-three thousand, four hundred forty-seven".