1313721452 has 12 divisors (see below), whose sum is σ = 2398969776. Its totient is φ = 628301520.

The previous prime is 1313721439. The next prime is 1313721473. The reversal of 1313721452 is 2541273131.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7139699 + ... + 7139882.

It is an arithmetic number, because the mean of its divisors is an integer number (199914148).

Almost surely, 2^1313721452 is an apocalyptic number.

It is an amenable number.

1313721452 is a deficient number, since it is larger than the sum of its proper divisors (1085248324).

1313721452 is a wasteful number, since it uses less digits than its factorization.

1313721452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14279608 (or 14279606 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 1313721452 is about 36245.2955843927. The cubic root of 1313721452 is about 1095.2193223587.

Adding to 1313721452 its reverse (2541273131), we get a palindrome (3854994583).

The spelling of 1313721452 in words is "one billion, three hundred thirteen million, seven hundred twenty-one thousand, four hundred fifty-two".