1291579452 has 48 divisors (see below), whose sum is σ = 3379864320. Its totient is φ = 426499056.

The previous prime is 1291579447. The next prime is 1291579469. The reversal of 1291579452 is 2549751921.

1291579452 is a `hidden beast` number, since 1 + 29 + 1 + 579 + 4 + 52 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1291579398 and 1291579407.

It is a congruent number.

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, 44328 + ... + 67439.

It is an arithmetic number, because the mean of its divisors is an integer number (70413840).

Almost surely, 2^1291579452 is an apocalyptic number.

1291579452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291579452 is an abundant number, since it is smaller than the sum of its proper divisors (2088284868).

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

1291579452 is a wasteful number, since it uses less digits than its factorization.

1291579452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111887 (or 111879 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 1291579452 is about 35938.5510559344. The cubic root of 1291579452 is about 1089.0313342379.

The spelling of 1291579452 in words is "one billion, two hundred ninety-one million, five hundred seventy-nine thousand, four hundred fifty-two".