1253909 has 2 divisors, whose sum is σ = 1253910. Its totient is φ = 1253908.

The previous prime is 1253897. The next prime is 1253911. The reversal of 1253909 is 9093521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 770884 + 483025 = 878^2 + 695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253909 is a prime.

Together with 1253911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1253969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626954 + 626955.

It is an arithmetic number, because the mean of its divisors is an integer number (626955).

2^1253909 is an apocalyptic number.

It is an amenable number.

1253909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253909 is an equidigital number, since it uses as much as digits as its factorization.

1253909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 1253909 is about 1119.7807821176. The cubic root of 1253909 is about 107.8339067904.

The spelling of 1253909 in words is "one million, two hundred fifty-three thousand, nine hundred nine".