12972290 has 8 divisors (see below), whose sum is σ = 23350140. Its totient is φ = 5188912.

The previous prime is 12972263. The next prime is 12972293. The reversal of 12972290 is 9227921.

It can be written as a sum of positive squares in 2 ways, for example, as 12666481 + 305809 = 3559^2 + 553^2 .

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 (12972293) 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, 648605 + ... + 648624.

Almost surely, 2^12972290 is an apocalyptic number.

12972290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12972290 is a deficient number, since it is larger than the sum of its proper divisors (10377850).

12972290 is a wasteful number, since it uses less digits than its factorization.

12972290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297236.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12972290 is about 3601.7065399613. The cubic root of 12972290 is about 234.9662845851.

The spelling of 12972290 in words is "twelve million, nine hundred seventy-two thousand, two hundred ninety".