1291474892 has 6 divisors (see below), whose sum is σ = 2260081068. Its totient is φ = 645737444.

The previous prime is 1291474889. The next prime is 1291474907. The reversal of 1291474892 is 2984741921.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161434358 + ... + 161434365.

It is an arithmetic number, because the mean of its divisors is an integer number (376680178).

Almost surely, 2^1291474892 is an apocalyptic number.

It is an amenable number.

1291474892 is a deficient number, since it is larger than the sum of its proper divisors (968606176).

1291474892 is a wasteful number, since it uses less digits than its factorization.

1291474892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322868727 (or 322868725 counting only the distinct ones).

The product of its digits is 290304, while the sum is 47.

The square root of 1291474892 is about 35937.0963212110. The cubic root of 1291474892 is about 1089.0019458822.

The spelling of 1291474892 in words is "one billion, two hundred ninety-one million, four hundred seventy-four thousand, eight hundred ninety-two".