1253009 has 4 divisors (see below), whose sum is σ = 1255716. Its totient is φ = 1250304.

The previous prime is 1252997. The next prime is 1253011. The reversal of 1253009 is 9003521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253009 + 1000000 = 503^2 + 1000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464 + ... + 1649.

It is an arithmetic number, because the mean of its divisors is an integer number (313929).

2^1253009 is an apocalyptic number.

It is an amenable number.

1253009 is a deficient number, since it is larger than the sum of its proper divisors (2707).

1253009 is an equidigital number, since it uses as much as digits as its factorization.

1253009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1253009 is about 1119.3788456104. The cubic root of 1253009 is about 107.8081011578.

The spelling of 1253009 in words is "one million, two hundred fifty-three thousand, nine".