1310402321 has 2 divisors, whose sum is σ = 1310402322. Its totient is φ = 1310402320.

The previous prime is 1310402297. The next prime is 1310402329. The reversal of 1310402321 is 1232040131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 752734096 + 557668225 = 27436^2 + 23615^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310402321 - 2²² = 1306208017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1310402321.

It is not a weakly prime, because it can be changed into another prime (1310402329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655201160 + 655201161.

It is an arithmetic number, because the mean of its divisors is an integer number (655201161).

Almost surely, 2^1310402321 is an apocalyptic number.

It is an amenable number.

1310402321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310402321 is an equidigital number, since it uses as much as digits as its factorization.

1310402321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1310402321 is about 36199.4795680822. The cubic root of 1310402321 is about 1094.2961834542.

Adding to 1310402321 its reverse (1232040131), we get a palindrome (2542442452).

The spelling of 1310402321 in words is "one billion, three hundred ten million, four hundred two thousand, three hundred twenty-one".