1291766452 has 12 divisors (see below), whose sum is σ = 2379569920. Its totient is φ = 611889336.

The previous prime is 1291766447. The next prime is 1291766453. The reversal of 1291766452 is 2546671921.

It is a junction number, because it is equal to n+sod(n) for n = 1291766399 and 1291766408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291766453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8498388 + ... + 8498539.

Almost surely, 2^1291766452 is an apocalyptic number.

It is an amenable number.

1291766452 is a deficient number, since it is larger than the sum of its proper divisors (1087803468).

1291766452 is a wasteful number, since it uses less digits than its factorization.

1291766452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16996950 (or 16996948 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 1291766452 is about 35941.1526248116. The cubic root of 1291766452 is about 1089.0838897948.

The spelling of 1291766452 in words is "one billion, two hundred ninety-one million, seven hundred sixty-six thousand, four hundred fifty-two".