1291449392 has 20 divisors (see below), whose sum is σ = 2503812960. Its totient is φ = 645304128.

The previous prime is 1291449377. The next prime is 1291449403. The reversal of 1291449392 is 2939441921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167 + ... + 50822.

It is an arithmetic number, because the mean of its divisors is an integer number (125190648).

Almost surely, 2^1291449392 is an apocalyptic number.

It is an amenable number.

1291449392 is a deficient number, since it is larger than the sum of its proper divisors (1212363568).

1291449392 is a wasteful number, since it uses less digits than its factorization.

1291449392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52580 (or 52574 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 1291449392 is about 35936.7415328658. The cubic root of 1291449392 is about 1088.9947784355.

The spelling of 1291449392 in words is "one billion, two hundred ninety-one million, four hundred forty-nine thousand, three hundred ninety-two".