1306413281 has 2 divisors, whose sum is σ = 1306413282. Its totient is φ = 1306413280.

The previous prime is 1306413259. The next prime is 1306413307. The reversal of 1306413281 is 1823146031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280566225 + 25847056 = 35785^2 + 5084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306413281 - 2²² = 1302218977 is a prime.

It is a super-2 number, since 2×1306413281² = 3413431321546369922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1306413211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653206640 + 653206641.

It is an arithmetic number, because the mean of its divisors is an integer number (653206641).

Almost surely, 2^1306413281 is an apocalyptic number.

It is an amenable number.

1306413281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306413281 is an equidigital number, since it uses as much as digits as its factorization.

1306413281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1306413281 is about 36144.3395430045. The cubic root of 1306413281 is about 1093.1846601476.

The spelling of 1306413281 in words is "one billion, three hundred six million, four hundred thirteen thousand, two hundred eighty-one".