1253423291 has 2 divisors, whose sum is σ = 1253423292. Its totient is φ = 1253423290.

The previous prime is 1253423257. The next prime is 1253423321. The reversal of 1253423291 is 1923243521.

It is a strong prime.

It is an emirp because it is prime and its reverse (1923243521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1253423291 - 2²² = 1249228987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253423221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626711645 + 626711646.

It is an arithmetic number, because the mean of its divisors is an integer number (626711646).

Almost surely, 2^1253423291 is an apocalyptic number.

1253423291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253423291 is an equidigital number, since it uses as much as digits as its factorization.

1253423291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

The square root of 1253423291 is about 35403.7186041241. The cubic root of 1253423291 is about 1078.1998162696.

The spelling of 1253423291 in words is "one billion, two hundred fifty-three million, four hundred twenty-three thousand, two hundred ninety-one".