11981595 has 8 divisors (see below), whose sum is σ = 19170576. Its totient is φ = 6390176.

The previous prime is 11981587. The next prime is 11981603. The reversal of 11981595 is 59518911.

It is an interprime number because it is at equal distance from previous prime (11981587) and next prime (11981603).

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 11981595 - 2³ = 11981587 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399372 + ... + 399401.

It is an arithmetic number, because the mean of its divisors is an integer number (2396322).

Almost surely, 2^11981595 is an apocalyptic number.

11981595 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11981595 is a deficient number, since it is larger than the sum of its proper divisors (7188981).

11981595 is an equidigital number, since it uses as much as digits as its factorization.

11981595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798781.

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

The square root of 11981595 is about 3461.4440628154. Note that the first 3 decimals coincide. The cubic root of 11981595 is about 228.8257415880.

The spelling of 11981595 in words is "eleven million, nine hundred eighty-one thousand, five hundred ninety-five".