11991259 has 8 divisors (see below), whose sum is σ = 13870080. Its totient is φ = 10153896.

The previous prime is 11991253. The next prime is 11991263. The reversal of 11991259 is 95219911.

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 11991259 - 2⁷ = 11991131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11991253) 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, 9739 + ... + 10900.

It is an arithmetic number, because the mean of its divisors is an integer number (1733760).

Almost surely, 2^11991259 is an apocalyptic number.

11991259 is a deficient number, since it is larger than the sum of its proper divisors (1878821).

11991259 is an equidigital number, since it uses as much as digits as its factorization.

11991259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20729.

The product of its digits is 7290, while the sum is 37.

The square root of 11991259 is about 3462.8397306257. The cubic root of 11991259 is about 228.8872464125.

It can be divided in two parts, 119 and 91259, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 11991259 in words is "eleven million, nine hundred ninety-one thousand, two hundred fifty-nine".