1255321247 has 2 divisors, whose sum is σ = 1255321248. Its totient is φ = 1255321246.

The previous prime is 1255321217. The next prime is 1255321339. The reversal of 1255321247 is 7421235521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255321247 - 2²⁰ = 1254272671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255321217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627660623 + 627660624.

It is an arithmetic number, because the mean of its divisors is an integer number (627660624).

Almost surely, 2^1255321247 is an apocalyptic number.

1255321247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255321247 is an equidigital number, since it uses as much as digits as its factorization.

1255321247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 32.

The square root of 1255321247 is about 35430.5129372974. The cubic root of 1255321247 is about 1078.7437516416.

Adding to 1255321247 its reverse (7421235521), we get a palindrome (8676556768).

The spelling of 1255321247 in words is "one billion, two hundred fifty-five million, three hundred twenty-one thousand, two hundred forty-seven".