1301022731 has 2 divisors, whose sum is σ = 1301022732. Its totient is φ = 1301022730.

The previous prime is 1301022727. The next prime is 1301022743. The reversal of 1301022731 is 1372201031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1301022731 - 2² = 1301022727 is a prime.

It is a super-2 number, since 2×1301022731² = 3385320293157396722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1301022781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650511365 + 650511366.

It is an arithmetic number, because the mean of its divisors is an integer number (650511366).

Almost surely, 2^1301022731 is an apocalyptic number.

1301022731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301022731 is an equidigital number, since it uses as much as digits as its factorization.

1301022731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 1301022731 is about 36069.6926934511. The cubic root of 1301022731 is about 1091.6790135102.

Adding to 1301022731 its reverse (1372201031), we get a palindrome (2673223762).

The spelling of 1301022731 in words is "one billion, three hundred one million, twenty-two thousand, seven hundred thirty-one".