1305245231 has 2 divisors, whose sum is σ = 1305245232. Its totient is φ = 1305245230.

The previous prime is 1305245219. The next prime is 1305245323. The reversal of 1305245231 is 1325425031.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305245231 is a prime.

It is a super-2 number, since 2×1305245231² = 3407330226096486722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1305245231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305245531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652622615 + 652622616.

It is an arithmetic number, because the mean of its divisors is an integer number (652622616).

Almost surely, 2^1305245231 is an apocalyptic number.

1305245231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305245231 is an equidigital number, since it uses as much as digits as its factorization.

1305245231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1305245231 is about 36128.1777979460. The cubic root of 1305245231 is about 1092.8587614695.

The spelling of 1305245231 in words is "one billion, three hundred five million, two hundred forty-five thousand, two hundred thirty-one".