1274326981 has 2 divisors, whose sum is σ = 1274326982. Its totient is φ = 1274326980.

The previous prime is 1274326943. The next prime is 1274327011. The reversal of 1274326981 is 1896234721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1243690756 + 30636225 = 35266^2 + 5535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1274326981 - 2²⁷ = 1140109253 is a prime.

It is a super-2 number, since 2×1274326981² = 3247818509009148722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1274326931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637163490 + 637163491.

It is an arithmetic number, because the mean of its divisors is an integer number (637163491).

Almost surely, 2^1274326981 is an apocalyptic number.

It is an amenable number.

1274326981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1274326981 is an equidigital number, since it uses as much as digits as its factorization.

1274326981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 1274326981 is about 35697.7167477137. The cubic root of 1274326981 is about 1084.1606145023.

The spelling of 1274326981 in words is "one billion, two hundred seventy-four million, three hundred twenty-six thousand, nine hundred eighty-one".