1235120109 has 24 divisors (see below), whose sum is σ = 1696911552. Its totient is φ = 799019520.

The previous prime is 1235120087. The next prime is 1235120113. The reversal of 1235120109 is 9010215321.

It is not a de Polignac number, because 1235120109 - 2⁵ = 1235120077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235120129) 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, 816664 + ... + 818174.

It is an arithmetic number, because the mean of its divisors is an integer number (70704648).

Almost surely, 2^1235120109 is an apocalyptic number.

It is an amenable number.

1235120109 is a deficient number, since it is larger than the sum of its proper divisors (461791443).

1235120109 is an equidigital number, since it uses as much as digits as its factorization.

1235120109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1235120109 is about 35144.2756220697. The cubic root of 1235120109 is about 1072.9259042745.

The spelling of 1235120109 in words is "one billion, two hundred thirty-five million, one hundred twenty thousand, one hundred nine".