1321541315 has 16 divisors (see below), whose sum is σ = 1676941056. Its totient is φ = 998169600.

The previous prime is 1321541311. The next prime is 1321541329. The reversal of 1321541315 is 5131451231.

It is not a de Polignac number, because 1321541315 - 2² = 1321541311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321541311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97622 + ... + 110331.

It is an arithmetic number, because the mean of its divisors is an integer number (104808816).

Almost surely, 2^1321541315 is an apocalyptic number.

1321541315 is a deficient number, since it is larger than the sum of its proper divisors (355399741).

1321541315 is a wasteful number, since it uses less digits than its factorization.

1321541315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208030.

The product of its digits is 1800, while the sum is 26.

The square root of 1321541315 is about 36353.0097103390. The cubic root of 1321541315 is about 1097.3881047462.

Adding to 1321541315 its reverse (5131451231), we get a palindrome (6452992546).

The spelling of 1321541315 in words is "one billion, three hundred twenty-one million, five hundred forty-one thousand, three hundred fifteen".