12665390 has 8 divisors (see below), whose sum is σ = 22797720. Its totient is φ = 5066152.

The previous prime is 12665383. The next prime is 12665407. The reversal of 12665390 is 9356621.

12665390 = T₁₂₉₂ + T₁₂₉₃ + ... + T₁₃₀₆.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633260 + ... + 633279.

It is an arithmetic number, because the mean of its divisors is an integer number (2849715).

Almost surely, 2^12665390 is an apocalyptic number.

12665390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12665390 is a deficient number, since it is larger than the sum of its proper divisors (10132330).

12665390 is a wasteful number, since it uses less digits than its factorization.

12665390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266546.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 12665390 is about 3558.8467233080. The cubic root of 12665390 is about 233.0985234206.

The spelling of 12665390 in words is "twelve million, six hundred sixty-five thousand, three hundred ninety".