1321405013 has 8 divisors (see below), whose sum is σ = 1363558560. Its totient is φ = 1279590480.

The previous prime is 1321405003. The next prime is 1321405049. The reversal of 1321405013 is 3105041231.

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 1321405013 - 2¹² = 1321400917 is a prime.

It is a super-2 number, since 2×1321405013² = 3492222416763060338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321405003) 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, 76823 + ... + 92436.

It is an arithmetic number, because the mean of its divisors is an integer number (170444820).

Almost surely, 2^1321405013 is an apocalyptic number.

It is an amenable number.

1321405013 is a deficient number, since it is larger than the sum of its proper divisors (42153547).

1321405013 is a wasteful number, since it uses less digits than its factorization.

1321405013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169507.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1321405013 is about 36351.1349616487. The cubic root of 1321405013 is about 1097.3503757363.

Adding to 1321405013 its reverse (3105041231), we get a palindrome (4426446244).

The spelling of 1321405013 in words is "one billion, three hundred twenty-one million, four hundred five thousand, thirteen".