1209234427 has 4 divisors (see below), whose sum is σ = 1209586480. Its totient is φ = 1208882376.

The previous prime is 1209234409. The next prime is 1209234449. The reversal of 1209234427 is 7244329021.

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 1209234427 - 2¹⁵ = 1209201659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1209234392 and 1209234401.

It is not an unprimeable number, because it can be changed into a prime (1209234457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170823 + ... + 177760.

It is an arithmetic number, because the mean of its divisors is an integer number (302396620).

Almost surely, 2^1209234427 is an apocalyptic number.

1209234427 is a deficient number, since it is larger than the sum of its proper divisors (352053).

1209234427 is an equidigital number, since it uses as much as digits as its factorization.

1209234427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352052.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1209234427 is about 34774.0481825168. The cubic root of 1209234427 is about 1065.3774520794.

The spelling of 1209234427 in words is "one billion, two hundred nine million, two hundred thirty-four thousand, four hundred twenty-seven".