11951985 has 8 divisors (see below), whose sum is σ = 19123200. Its totient is φ = 6374384.

The previous prime is 11951983. The next prime is 11951987. The reversal of 11951985 is 58915911.

It is an interprime number because it is at equal distance from previous prime (11951983) and next prime (11951987).

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

It is a cyclic number.

It is not a de Polignac number, because 11951985 - 2¹ = 11951983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11951983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398385 + ... + 398414.

It is an arithmetic number, because the mean of its divisors is an integer number (2390400).

Almost surely, 2^11951985 is an apocalyptic number.

11951985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11951985 is a deficient number, since it is larger than the sum of its proper divisors (7171215).

11951985 is an equidigital number, since it uses as much as digits as its factorization.

11951985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796807.

The product of its digits is 16200, while the sum is 39.

The square root of 11951985 is about 3457.1643004058. The cubic root of 11951985 is about 228.6370878148.

The spelling of 11951985 in words is "eleven million, nine hundred fifty-one thousand, nine hundred eighty-five".