12278473 has 2 divisors, whose sum is σ = 12278474. Its totient is φ = 12278472.

The previous prime is 12278447. The next prime is 12278479. The reversal of 12278473 is 37487221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11778624 + 499849 = 3432^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 12278473 - 2¹³ = 12270281 is a prime.

It is not a weakly prime, because it can be changed into another prime (12278479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6139236 + 6139237.

It is an arithmetic number, because the mean of its divisors is an integer number (6139237).

Almost surely, 2^12278473 is an apocalyptic number.

It is an amenable number.

12278473 is a deficient number, since it is larger than the sum of its proper divisors (1).

12278473 is an equidigital number, since it uses as much as digits as its factorization.

12278473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 34.

The square root of 12278473 is about 3504.0652105804. The cubic root of 12278473 is about 230.7002790609.

The spelling of 12278473 in words is "twelve million, two hundred seventy-eight thousand, four hundred seventy-three".