12290691 has 8 divisors (see below), whose sum is σ = 18728704. Its totient is φ = 7023240.

The previous prime is 12290687. The next prime is 12290713. The reversal of 12290691 is 19609221.

It is a happy number.

12290691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12290691 - 2² = 12290687 is a prime.

It is a super-2 number, since 2×12290691² = 302122170514962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12290651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292615 + ... + 292656.

It is an arithmetic number, because the mean of its divisors is an integer number (2341088).

Almost surely, 2^12290691 is an apocalyptic number.

12290691 is a deficient number, since it is larger than the sum of its proper divisors (6438013).

12290691 is an equidigital number, since it uses as much as digits as its factorization.

12290691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585281.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 12290691 is about 3505.8081807195. The cubic root of 12290691 is about 230.7767750440.

It can be divided in two parts, 12 and 290691, that added together give a triangular number (290703 = T₇₆₂).

The spelling of 12290691 in words is "twelve million, two hundred ninety thousand, six hundred ninety-one".