1255664253 has 4 divisors (see below), whose sum is σ = 1674219008. Its totient is φ = 837109500.

The previous prime is 1255664239. The next prime is 1255664257. The reversal of 1255664253 is 3524665521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1255664253 - 2¹⁰ = 1255663229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255664257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209277373 + ... + 209277378.

It is an arithmetic number, because the mean of its divisors is an integer number (418554752).

Almost surely, 2^1255664253 is an apocalyptic number.

It is an amenable number.

1255664253 is a deficient number, since it is larger than the sum of its proper divisors (418554755).

1255664253 is an equidigital number, since it uses as much as digits as its factorization.

1255664253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418554754.

The product of its digits is 216000, while the sum is 39.

The square root of 1255664253 is about 35435.3531519018. The cubic root of 1255664253 is about 1078.8419952543.

The spelling of 1255664253 in words is "one billion, two hundred fifty-five million, six hundred sixty-four thousand, two hundred fifty-three".