12257290 has 8 divisors (see below), whose sum is σ = 22063140. Its totient is φ = 4902912.

The previous prime is 12257281. The next prime is 12257291. The reversal of 12257290 is 9275221.

It can be written as a sum of positive squares in 2 ways, for example, as 12257001 + 289 = 3501^2 + 17^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12257291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612855 + ... + 612874.

Almost surely, 2^12257290 is an apocalyptic number.

12257290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12257290 is a deficient number, since it is larger than the sum of its proper divisors (9805850).

12257290 is a wasteful number, since it uses less digits than its factorization.

12257290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225736.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 12257290 is about 3501.0412736784. The cubic root of 12257290 is about 230.5675335358.

It can be divided in two parts, 1225 and 7290, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 12257290 in words is "twelve million, two hundred fifty-seven thousand, two hundred ninety".