1313721451 has 8 divisors (see below), whose sum is σ = 1501747200. Its totient is φ = 1125783528.

The previous prime is 1313721439. The next prime is 1313721473. The reversal of 1313721451 is 1541273131.

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 1313721451 - 2⁵ = 1313721419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313721481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14040 + ... + 53146.

It is an arithmetic number, because the mean of its divisors is an integer number (187718400).

Almost surely, 2^1313721451 is an apocalyptic number.

1313721451 is a deficient number, since it is larger than the sum of its proper divisors (188025749).

1313721451 is an equidigital number, since it uses as much as digits as its factorization.

1313721451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43913.

The product of its digits is 2520, while the sum is 28.

The square root of 1313721451 is about 36245.2955705978. The cubic root of 1313721451 is about 1095.2193220808.

Adding to 1313721451 its reverse (1541273131), we get a palindrome (2854994582).

The spelling of 1313721451 in words is "one billion, three hundred thirteen million, seven hundred twenty-one thousand, four hundred fifty-one".