1321352251 has 8 divisors (see below), whose sum is σ = 1436892480. Its totient is φ = 1210013568.

The previous prime is 1321352243. The next prime is 1321352269. The reversal of 1321352251 is 1522531231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321352251 - 2³ = 1321352243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321353251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1049731 + ... + 1050988.

It is an arithmetic number, because the mean of its divisors is an integer number (179611560).

Almost surely, 2^1321352251 is an apocalyptic number.

1321352251 is a deficient number, since it is larger than the sum of its proper divisors (115540229).

1321352251 is a wasteful number, since it uses less digits than its factorization.

1321352251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100773.

The product of its digits is 1800, while the sum is 25.

The square root of 1321352251 is about 36350.4092274076. The cubic root of 1321352251 is about 1097.3357702796.

Adding to 1321352251 its reverse (1522531231), we get a palindrome (2843883482).

The spelling of 1321352251 in words is "one billion, three hundred twenty-one million, three hundred fifty-two thousand, two hundred fifty-one".