1230091 has 4 divisors (see below), whose sum is σ = 1251000. Its totient is φ = 1209184.

The previous prime is 1230071. The next prime is 1230107. The reversal of 1230091 is 1900321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230071) 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, 10366 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (312750).

2^1230091 is an apocalyptic number.

1230091 is a deficient number, since it is larger than the sum of its proper divisors (20909).

1230091 is an equidigital number, since it uses as much as digits as its factorization.

1230091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20908.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1230091 is about 1109.0946758505. The cubic root of 1230091 is about 107.1467692117.

It can be divided in two parts, 12 and 30091, that added together give a palindrome (30103).

The spelling of 1230091 in words is "one million, two hundred thirty thousand, ninety-one".