1299491 has 2 divisors, whose sum is σ = 1299492. Its totient is φ = 1299490.

The previous prime is 1299457. The next prime is 1299499. The reversal of 1299491 is 1949921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1299491 - 2¹⁰ = 1298467 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1299499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649745 + 649746.

It is an arithmetic number, because the mean of its divisors is an integer number (649746).

2^1299491 is an apocalyptic number.

1299491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299491 is an equidigital number, since it uses as much as digits as its factorization.

1299491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 35.

The square root of 1299491 is about 1139.9521919800. The cubic root of 1299491 is about 109.1250423703.

The spelling of 1299491 in words is "one million, two hundred ninety-nine thousand, four hundred ninety-one".