12117590 has 16 divisors (see below), whose sum is σ = 22515840. Its totient is φ = 4690560.

The previous prime is 12117571. The next prime is 12117607. The reversal of 12117590 is 9571121.

12117590 = 199² + 200² + ... + 353².

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19235 + ... + 19854.

It is an arithmetic number, because the mean of its divisors is an integer number (1407240).

Almost surely, 2^12117590 is an apocalyptic number.

12117590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12117590 is a deficient number, since it is larger than the sum of its proper divisors (10398250).

12117590 is a wasteful number, since it uses less digits than its factorization.

12117590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39127.

The product of its (nonzero) digits is 630, while the sum is 26.

The square root of 12117590 is about 3481.0328926915. The cubic root of 12117590 is about 229.6882354397.

The spelling of 12117590 in words is "twelve million, one hundred seventeen thousand, five hundred ninety".