1291233424 has 40 divisors (see below), whose sum is σ = 2698230080. Its totient is φ = 595064448.

The previous prime is 1291233413. The next prime is 1291233443. The reversal of 1291233424 is 4243321921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146947 + ... + 155485.

It is an arithmetic number, because the mean of its divisors is an integer number (67455752).

Almost surely, 2^1291233424 is an apocalyptic number.

It is an amenable number.

1291233424 is an abundant number, since it is smaller than the sum of its proper divisors (1406996656).

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

1291233424 is a wasteful number, since it uses less digits than its factorization.

1291233424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287 (or 9281 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 1291233424 is about 35933.7365716397. The cubic root of 1291233424 is about 1088.9340711565.

The spelling of 1291233424 in words is "one billion, two hundred ninety-one million, two hundred thirty-three thousand, four hundred twenty-four".