1272539 has 2 divisors, whose sum is σ = 1272540. Its totient is φ = 1272538.

The previous prime is 1272461. The next prime is 1272547. The reversal of 1272539 is 9352721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1272539 - 2⁸ = 1272283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1272559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636269 + 636270.

It is an arithmetic number, because the mean of its divisors is an integer number (636270).

2^1272539 is an apocalyptic number.

1272539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272539 is an equidigital number, since it uses as much as digits as its factorization.

1272539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 1272539 is about 1128.0687035815. The cubic root of 1272539 is about 108.3653322962.

The spelling of 1272539 in words is "one million, two hundred seventy-two thousand, five hundred thirty-nine".