1230645109 has 4 divisors (see below), whose sum is σ = 1232447616. Its totient is φ = 1228842604.

The previous prime is 1230645103. The next prime is 1230645121. The reversal of 1230645109 is 9015460321.

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 1230645109 - 2¹¹ = 1230643061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230645103) 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, 900229 + ... + 901594.

It is an arithmetic number, because the mean of its divisors is an integer number (308111904).

Almost surely, 2^1230645109 is an apocalyptic number.

It is an amenable number.

1230645109 is a deficient number, since it is larger than the sum of its proper divisors (1802507).

1230645109 is an equidigital number, since it uses as much as digits as its factorization.

1230645109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802506.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1230645109 is about 35080.5517202908. The cubic root of 1230645109 is about 1071.6285530517.

The spelling of 1230645109 in words is "one billion, two hundred thirty million, six hundred forty-five thousand, one hundred nine".