1291552132 has 48 divisors (see below), whose sum is σ = 2644902400. Its totient is φ = 546497280.

The previous prime is 1291552109. The next prime is 1291552159. The reversal of 1291552132 is 2312551921.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 1291552094 and 1291552103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9544 + ... + 51712.

Almost surely, 2^1291552132 is an apocalyptic number.

It is an amenable number.

1291552132 is an abundant number, since it is smaller than the sum of its proper divisors (1353350268).

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

1291552132 is a wasteful number, since it uses less digits than its factorization.

1291552132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42236 (or 42234 counting only the distinct ones).

The product of its digits is 5400, while the sum is 31.

The square root of 1291552132 is about 35938.1709606930. The cubic root of 1291552132 is about 1089.0236556431.

The spelling of 1291552132 in words is "one billion, two hundred ninety-one million, five hundred fifty-two thousand, one hundred thirty-two".