1230491 has 2 divisors, whose sum is σ = 1230492. Its totient is φ = 1230490.

The previous prime is 1230479. The next prime is 1230521. The reversal of 1230491 is 1940321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1230401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615245 + 615246.

It is an arithmetic number, because the mean of its divisors is an integer number (615246).

2^1230491 is an apocalyptic number.

1230491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230491 is an equidigital number, since it uses as much as digits as its factorization.

1230491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1230491 is about 1109.2749884497. The cubic root of 1230491 is about 107.1583819197.

It can be divided in two parts, 12 and 30491, that added together give a palindrome (30503).

The spelling of 1230491 in words is "one million, two hundred thirty thousand, four hundred ninety-one".