1295779481 has 4 divisors (see below), whose sum is σ = 1298857764. Its totient is φ = 1292701200.

The previous prime is 1295779477. The next prime is 1295779487. The reversal of 1295779481 is 1849775921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 1293481225 = 1516^2 + 35965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1295779481 - 2² = 1295779477 is a prime.

It is a super-2 number, since 2×1295779481² = 3358088926761258722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1295779487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1538510 + ... + 1539351.

It is an arithmetic number, because the mean of its divisors is an integer number (324714441).

Almost surely, 2^1295779481 is an apocalyptic number.

It is an amenable number.

1295779481 is a deficient number, since it is larger than the sum of its proper divisors (3078283).

1295779481 is an equidigital number, since it uses as much as digits as its factorization.

1295779481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078282.

The product of its digits is 1270080, while the sum is 53.

The square root of 1295779481 is about 35996.9371058150. The cubic root of 1295779481 is about 1090.2105142879.

The spelling of 1295779481 in words is "one billion, two hundred ninety-five million, seven hundred seventy-nine thousand, four hundred eighty-one".