1308491 has 2 divisors, whose sum is σ = 1308492. Its totient is φ = 1308490.

The previous prime is 1308467. The next prime is 1308497. The reversal of 1308491 is 1948031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1308491 - 2¹⁸ = 1046347 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1308491.

It is not a weakly prime, because it can be changed into another prime (1308497) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654245 + 654246.

It is an arithmetic number, because the mean of its divisors is an integer number (654246).

2^1308491 is an apocalyptic number.

1308491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1308491 is an equidigital number, since it uses as much as digits as its factorization.

1308491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1308491 is about 1143.8929145685. The cubic root of 1308491 is about 109.3763886626.

The spelling of 1308491 in words is "one million, three hundred eight thousand, four hundred ninety-one".