11961590 has 16 divisors (see below), whose sum is σ = 21636720. Its totient is φ = 4761120.

The previous prime is 11961589. The next prime is 11961647. The reversal of 11961590 is 9516911.

It is a happy number.

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, 725 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (1352295).

Almost surely, 2^11961590 is an apocalyptic number.

11961590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11961590 is a deficient number, since it is larger than the sum of its proper divisors (9675130).

11961590 is a wasteful number, since it uses less digits than its factorization.

11961590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5887.

The product of its (nonzero) digits is 2430, while the sum is 32.

The square root of 11961590 is about 3458.5531657038. The cubic root of 11961590 is about 228.6983181241.

The spelling of 11961590 in words is "eleven million, nine hundred sixty-one thousand, five hundred ninety".