1295478081 has 24 divisors (see below), whose sum is σ = 1985671584. Its totient is φ = 811063680.

The previous prime is 1295478073. The next prime is 1295478091. The reversal of 1295478081 is 1808745921.

1295478081 is a `hidden beast` number, since 1 + 29 + 547 + 8 + 0 + 81 = 666.

It is not a de Polignac number, because 1295478081 - 2³ = 1295478073 is a prime.

It is a super-2 number, since 2×1295478081² = 3356526916702885122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1295478091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62386 + ... + 80516.

It is an arithmetic number, because the mean of its divisors is an integer number (82736316).

Almost surely, 2^1295478081 is an apocalyptic number.

It is an amenable number.

1295478081 is a deficient number, since it is larger than the sum of its proper divisors (690193503).

1295478081 is a wasteful number, since it uses less digits than its factorization.

1295478081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18621 (or 18618 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1295478081 is about 35992.7503950448. The cubic root of 1295478081 is about 1090.1259796034.

The spelling of 1295478081 in words is "one billion, two hundred ninety-five million, four hundred seventy-eight thousand, eighty-one".