1252801209 has 24 divisors (see below), whose sum is σ = 1845486720. Its totient is φ = 755376160.

The previous prime is 1252801183. The next prime is 1252801243. The reversal of 1252801209 is 9021082521.

It is not a de Polignac number, because 1252801209 - 2¹² = 1252797113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1252801709) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62752 + ... + 80270.

It is an arithmetic number, because the mean of its divisors is an integer number (76895280).

Almost surely, 2^1252801209 is an apocalyptic number.

It is an amenable number.

1252801209 is a deficient number, since it is larger than the sum of its proper divisors (592685511).

1252801209 is a wasteful number, since it uses less digits than its factorization.

1252801209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17741 (or 17730 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1252801209 is about 35394.9319677267. The cubic root of 1252801209 is about 1078.0214142629.

The spelling of 1252801209 in words is "one billion, two hundred fifty-two million, eight hundred one thousand, two hundred nine".