1321502345 has 16 divisors (see below), whose sum is σ = 1689387840. Its totient is φ = 989486784.

The previous prime is 1321502311. The next prime is 1321502387. The reversal of 1321502345 is 5432051231.

1321502345 = T₅₂₂₇ + T₅₂₂₈ + ... + T₅₃₂₁.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1321502345 - 2²⁰ = 1320453769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75914 + ... + 91683.

It is an arithmetic number, because the mean of its divisors is an integer number (105586740).

Almost surely, 2^1321502345 is an apocalyptic number.

It is an amenable number.

1321502345 is a deficient number, since it is larger than the sum of its proper divisors (367885495).

1321502345 is a wasteful number, since it uses less digits than its factorization.

1321502345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167704.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1321502345 is about 36352.4737122524. The cubic root of 1321502345 is about 1097.3773179389.

Adding to 1321502345 its reverse (5432051231), we get a palindrome (6753553576).

The spelling of 1321502345 in words is "one billion, three hundred twenty-one million, five hundred two thousand, three hundred forty-five".