12291403 has 2 divisors, whose sum is σ = 12291404. Its totient is φ = 12291402.

The previous prime is 12291379. The next prime is 12291413. The reversal of 12291403 is 30419221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12291403 is a prime.

It is not a weakly prime, because it can be changed into another prime (12291413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6145701 + 6145702.

It is an arithmetic number, because the mean of its divisors is an integer number (6145702).

Almost surely, 2^12291403 is an apocalyptic number.

12291403 is a deficient number, since it is larger than the sum of its proper divisors (1).

12291403 is an equidigital number, since it uses as much as digits as its factorization.

12291403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 12291403 is about 3505.9097250215. The cubic root of 12291403 is about 230.7812312591.

The spelling of 12291403 in words is "twelve million, two hundred ninety-one thousand, four hundred three".