1295979481 has 2 divisors, whose sum is σ = 1295979482. Its totient is φ = 1295979480.

The previous prime is 1295979473. The next prime is 1295979499. The reversal of 1295979481 is 1849795921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1148599881 + 147379600 = 33891^2 + 12140^2 .

It is a cyclic number.

It is not a de Polignac number, because 1295979481 - 2³ = 1295979473 is a prime.

It is a super-2 number, since 2×1295979481² = 3359125630346058722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1295979431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647989740 + 647989741.

It is an arithmetic number, because the mean of its divisors is an integer number (647989741).

Almost surely, 2^1295979481 is an apocalyptic number.

It is an amenable number.

1295979481 is a deficient number, since it is larger than the sum of its proper divisors (1).

1295979481 is an equidigital number, since it uses as much as digits as its factorization.

1295979481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 55.

The square root of 1295979481 is about 35999.7150127609. The cubic root of 1295979481 is about 1090.2666017341.

The spelling of 1295979481 in words is "one billion, two hundred ninety-five million, nine hundred seventy-nine thousand, four hundred eighty-one".