1252009 has 4 divisors (see below), whose sum is σ = 1365840. Its totient is φ = 1138180.

The previous prime is 1251983. The next prime is 1252021. The reversal of 1252009 is 9002521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1252009 - 2⁷ = 1251881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252049) 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, 56899 + ... + 56920.

It is an arithmetic number, because the mean of its divisors is an integer number (341460).

2^1252009 is an apocalyptic number.

It is an amenable number.

1252009 is a deficient number, since it is larger than the sum of its proper divisors (113831).

1252009 is a wasteful number, since it uses less digits than its factorization.

1252009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113830.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1252009 is about 1118.9320801550. The cubic root of 1252009 is about 107.7794137358.

The spelling of 1252009 in words is "one million, two hundred fifty-two thousand, nine".