1227491 has 2 divisors, whose sum is σ = 1227492. Its totient is φ = 1227490.

The previous prime is 1227469. The next prime is 1227497. The reversal of 1227491 is 1947221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1227491 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 1227491.

It is not a weakly prime, because it can be changed into another prime (1227497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613745 + 613746.

It is an arithmetic number, because the mean of its divisors is an integer number (613746).

2^1227491 is an apocalyptic number.

1227491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227491 is an equidigital number, since it uses as much as digits as its factorization.

1227491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 1227491 is about 1107.9219286574. The cubic root of 1227491 is about 107.0712251782.

The spelling of 1227491 in words is "one million, two hundred twenty-seven thousand, four hundred ninety-one".