1253839 has 2 divisors, whose sum is σ = 1253840. Its totient is φ = 1253838.

The previous prime is 1253831. The next prime is 1253849. The reversal of 1253839 is 9383521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1253839 - 2³ = 1253831 is a prime.

It is a super-2 number, since 2×1253839² = 3144224475842, which contains 22 as substring.

It is a Chen prime.

1253839 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1253839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253831) 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, 626919 + 626920.

It is an arithmetic number, because the mean of its divisors is an integer number (626920).

2^1253839 is an apocalyptic number.

1253839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253839 is an equidigital number, since it uses as much as digits as its factorization.

1253839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 1253839 is about 1119.7495255636. The cubic root of 1253839 is about 107.8319001286.

The spelling of 1253839 in words is "one million, two hundred fifty-three thousand, eight hundred thirty-nine".