12557026 has 4 divisors (see below), whose sum is σ = 18835542. Its totient is φ = 6278512.

The previous prime is 12557021. The next prime is 12557053. The reversal of 12557026 is 62075521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8415801 + 4141225 = 2901^2 + 2035^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12556985 and 12557003.

It is not an unprimeable number, because it can be changed into a prime (12557021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3139255 + ... + 3139258.

Almost surely, 2^12557026 is an apocalyptic number.

12557026 is a deficient number, since it is larger than the sum of its proper divisors (6278516).

12557026 is an equidigital number, since it uses as much as digits as its factorization.

12557026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6278515.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 12557026 is about 3543.5894231697. The cubic root of 12557026 is about 232.4318280109.

It can be divided in two parts, 1255 and 7026, that added together give a square (8281 = 91²).

The spelling of 12557026 in words is "twelve million, five hundred fifty-seven thousand, twenty-six".