1255321253 has 4 divisors (see below), whose sum is σ = 1261629600. Its totient is φ = 1249012908.

The previous prime is 1255321247. The next prime is 1255321339. The reversal of 1255321253 is 3521235521.

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 a cyclic number.

It is not a de Polignac number, because 1255321253 - 2²⁴ = 1238544037 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 (1255321153) 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, 3153875 + ... + 3154272.

It is an arithmetic number, because the mean of its divisors is an integer number (315407400).

Almost surely, 2^1255321253 is an apocalyptic number.

It is an amenable number.

1255321253 is a deficient number, since it is larger than the sum of its proper divisors (6308347).

1255321253 is an equidigital number, since it uses as much as digits as its factorization.

1255321253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308346.

The product of its digits is 9000, while the sum is 29.

The square root of 1255321253 is about 35430.5130219702. The cubic root of 1255321253 is about 1078.7437533603.

Adding to 1255321253 its reverse (3521235521), we get a palindrome (4776556774).

The spelling of 1255321253 in words is "one billion, two hundred fifty-five million, three hundred twenty-one thousand, two hundred fifty-three".