1291124956 has 24 divisors (see below), whose sum is σ = 2480010624. Its totient is φ = 583271280.

The previous prime is 1291124951. The next prime is 1291124971. The reversal of 1291124956 is 6594211921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291124951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82840 + ... + 97183.

It is an arithmetic number, because the mean of its divisors is an integer number (103333776).

Almost surely, 2^1291124956 is an apocalyptic number.

It is an amenable number.

1291124956 is a deficient number, since it is larger than the sum of its proper divisors (1188885668).

1291124956 is a wasteful number, since it uses less digits than its factorization.

1291124956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180201 (or 180199 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The square root of 1291124956 is about 35932.2272618885. The cubic root of 1291124956 is about 1088.9035789139.

The spelling of 1291124956 in words is "one billion, two hundred ninety-one million, one hundred twenty-four thousand, nine hundred fifty-six".