1321297469 has 4 divisors (see below), whose sum is σ = 1363920000. Its totient is φ = 1278674940.

The previous prime is 1321297463. The next prime is 1321297489. The reversal of 1321297469 is 9647921231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321297469 - 2⁸ = 1321297213 is a prime.

It is a super-2 number, since 2×1321297469² = 3491654003171611922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321297463) 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, 21311219 + ... + 21311280.

It is an arithmetic number, because the mean of its divisors is an integer number (340980000).

Almost surely, 2^1321297469 is an apocalyptic number.

It is an amenable number.

1321297469 is a deficient number, since it is larger than the sum of its proper divisors (42622531).

1321297469 is an equidigital number, since it uses as much as digits as its factorization.

1321297469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42622530.

The product of its digits is 163296, while the sum is 44.

The square root of 1321297469 is about 36349.6556930049. The cubic root of 1321297469 is about 1097.3206052397.

The spelling of 1321297469 in words is "one billion, three hundred twenty-one million, two hundred ninety-seven thousand, four hundred sixty-nine".