1252609 has 2 divisors, whose sum is σ = 1252610. Its totient is φ = 1252608.

The previous prime is 1252579. The next prime is 1252631. The reversal of 1252609 is 9062521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 801025 + 451584 = 895^2 + 672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252609 is a prime.

1252609 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1252639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626304 + 626305.

It is an arithmetic number, because the mean of its divisors is an integer number (626305).

2^1252609 is an apocalyptic number.

It is an amenable number.

1252609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252609 is an equidigital number, since it uses as much as digits as its factorization.

1252609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1252609 is about 1119.2001608292. The cubic root of 1252609 is about 107.7966280212.

The spelling of 1252609 in words is "one million, two hundred fifty-two thousand, six hundred nine".