1304256253 has 4 divisors (see below), whose sum is σ = 1339506460. Its totient is φ = 1269006048.

The previous prime is 1304256227. The next prime is 1304256259. The reversal of 1304256253 is 3526524031.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3526524031 = 337 ⋅10464463.

It can be written as a sum of positive squares in 2 ways, for example, as 1049630404 + 254625849 = 32398^2 + 15957^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304256253 - 2²¹ = 1302159101 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 (1304256259) 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, 17625048 + ... + 17625121.

It is an arithmetic number, because the mean of its divisors is an integer number (334876615).

Almost surely, 2^1304256253 is an apocalyptic number.

It is an amenable number.

1304256253 is a deficient number, since it is larger than the sum of its proper divisors (35250207).

1304256253 is an equidigital number, since it uses as much as digits as its factorization.

1304256253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35250206.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 1304256253 is about 36114.4881314965. The cubic root of 1304256253 is about 1092.5826737946.

The spelling of 1304256253 in words is "one billion, three hundred four million, two hundred fifty-six thousand, two hundred fifty-three".