1291662632 has 16 divisors (see below), whose sum is σ = 2608165140. Its totient is φ = 596151936.

The previous prime is 1291662623. The next prime is 1291662641. The reversal of 1291662632 is 2362661921.

It is an interprime number because it is at equal distance from previous prime (1291662623) and next prime (1291662641).

It can be written as a sum of positive squares in 2 ways, for example, as 1118634916 + 173027716 = 33446^2 + 13154^2 .

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, 6209813 + ... + 6210020.

Almost surely, 2^1291662632 is an apocalyptic number.

It is an amenable number.

1291662632 is an abundant number, since it is smaller than the sum of its proper divisors (1316502508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1291662632 is a wasteful number, since it uses less digits than its factorization.

1291662632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12419852 (or 12419848 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 1291662632 is about 35939.7082904133. The cubic root of 1291662632 is about 1089.0547122505.

The spelling of 1291662632 in words is "one billion, two hundred ninety-one million, six hundred sixty-two thousand, six hundred thirty-two".