1209231259 has 4 divisors (see below), whose sum is σ = 1209384216. Its totient is φ = 1209078304.

The previous prime is 1209231239. The next prime is 1209231281. The reversal of 1209231259 is 9521329021.

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

It is a cyclic number.

It is not a de Polignac number, because 1209231259 - 2⁹ = 1209230747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1209231239) 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, 63934 + ... + 80659.

It is an arithmetic number, because the mean of its divisors is an integer number (302346054).

Almost surely, 2^1209231259 is an apocalyptic number.

1209231259 is a deficient number, since it is larger than the sum of its proper divisors (152957).

1209231259 is an equidigital number, since it uses as much as digits as its factorization.

1209231259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152956.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1209231259 is about 34774.0026312761. The cubic root of 1209231259 is about 1065.3765217060.

The spelling of 1209231259 in words is "one billion, two hundred nine million, two hundred thirty-one thousand, two hundred fifty-nine".