12103279 has 2 divisors, whose sum is σ = 12103280.
Its totient is φ = 12103278.
The previous prime is 12103277. The next prime is 12103331. The reversal of 12103279 is 97230121.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 12103279 - 21 = 12103277 is a prime.
Together with 12103277, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (12103271) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6051639 + 6051640.
It is an arithmetic number, because the mean of its divisors is an integer number (6051640).
Almost surely, 212103279 is an apocalyptic number.
12103279 is a deficient number, since it is larger than the sum of its proper divisors (1).
12103279 is an equidigital number, since it uses as much as digits as its factorization.
12103279 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 756, while the sum is 25.
The square root of 12103279 is about 3478.9767173696.
The cubic root of 12103279 is about 229.5977784206.
It can be divided in two parts, 1210 and 3279, that added together give a square (4489 = 672).
The spelling of 12103279 in words is "twelve million, one hundred three thousand, two hundred seventy-nine".