1291467969 has 49 divisors (see below), whose sum is σ = 2129947681. Its totient is φ = 782707860.

The previous prime is 1291467959. The next prime is 1291468007. The reversal of 1291467969 is 9697641921.

It is a happy number.

The square root of 1291467969 is 35937.

The cubic root of 1291467969 is 1089.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

1291467969 is a `hidden beast` number, since 1 + 2 + 91 + 467 + 96 + 9 = 666.

It is not a de Polignac number, because 1291467969 - 2¹³ = 1291459777 is a prime.

It is a super-2 number, since 2×1291467969² = 3335779029905969922, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (1469664) is a multiple of the sum of its prime divisors (14).

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (1291467929) by changing a digit.

It is a polite number, since it can be written in 48 ways as a sum of consecutive naturals, for example, 117406174 + ... + 117406184.

Almost surely, 2^1291467969 is an apocalyptic number.

1291467969 is the 35937-th square number.

1291467969 is the 17969-th centered octagonal number.

It is an amenable number.

1291467969 is a deficient number, since it is larger than the sum of its proper divisors (838479712).

1291467969 is an frugal number, since it uses more digits than its factorization.

1291467969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 14 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The spelling of 1291467969 in words is "one billion, two hundred ninety-one million, four hundred sixty-seven thousand, nine hundred sixty-nine".