1291827364 has 9 divisors (see below), whose sum is σ = 2260823691. Its totient is φ = 645877740.

The previous prime is 1291827349. The next prime is 1291827367. The reversal of 1291827364 is 4637281921.

The square root of 1291827364 is 35942.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1291827364.

It is not an unprimeable number, because it can be changed into a prime (1291827367) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 62899 + ... + 80869.

Almost surely, 2^1291827364 is an apocalyptic number.

1291827364 is the 35942-nd square number.

It is an amenable number.

1291827364 is a deficient number, since it is larger than the sum of its proper divisors (968996327).

1291827364 is an frugal number, since it uses more digits than its factorization.

1291827364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35946 (or 17973 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The cubic root of 1291827364 is about 1089.1010077589.

The spelling of 1291827364 in words is "one billion, two hundred ninety-one million, eight hundred twenty-seven thousand, three hundred sixty-four".