1310254021 has 2 divisors, whose sum is σ = 1310254022. Its totient is φ = 1310254020.

The previous prime is 1310254007. The next prime is 1310254037. The reversal of 1310254021 is 1204520131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1266363396 + 43890625 = 35586^2 + 6625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310254021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1310254021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310254051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655127010 + 655127011.

It is an arithmetic number, because the mean of its divisors is an integer number (655127011).

Almost surely, 2^1310254021 is an apocalyptic number.

It is an amenable number.

1310254021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310254021 is an equidigital number, since it uses as much as digits as its factorization.

1310254021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1310254021 is about 36197.4311381347. The cubic root of 1310254021 is about 1094.2549009046.

Adding to 1310254021 its reverse (1204520131), we get a palindrome (2514774152).

The spelling of 1310254021 in words is "one billion, three hundred ten million, two hundred fifty-four thousand, twenty-one".