12623257 has 4 divisors (see below), whose sum is σ = 12663396. Its totient is φ = 12583120.

The previous prime is 12623189. The next prime is 12623287. The reversal of 12623257 is 75232621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75232621 = 6247 ⋅12043.

It can be written as a sum of positive squares in 2 ways, for example, as 3956121 + 8667136 = 1989^2 + 2944^2 .

It is a cyclic number.

It is not a de Polignac number, because 12623257 - 2¹⁹ = 12098969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12623287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19594 + ... + 20227.

It is an arithmetic number, because the mean of its divisors is an integer number (3165849).

Almost surely, 2^12623257 is an apocalyptic number.

It is an amenable number.

12623257 is a deficient number, since it is larger than the sum of its proper divisors (40139).

12623257 is an equidigital number, since it uses as much as digits as its factorization.

12623257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40138.

The product of its digits is 5040, while the sum is 28.

The square root of 12623257 is about 3552.9223183177. The cubic root of 12623257 is about 232.8397591642.

Adding to 12623257 its reverse (75232621), we get a palindrome (87855878).

It can be divided in two parts, 12623 and 257, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 12623257 in words is "twelve million, six hundred twenty-three thousand, two hundred fifty-seven".