11981263 has 8 divisors (see below), whose sum is σ = 14165280. Its totient is φ = 9915360.

The previous prime is 11981237. The next prime is 11981273. The reversal of 11981263 is 36218911.

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

It is not a de Polignac number, because 11981263 - 2⁵ = 11981231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11981273) 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, 29308 + ... + 29713.

It is an arithmetic number, because the mean of its divisors is an integer number (1770660).

Almost surely, 2^11981263 is an apocalyptic number.

11981263 is a deficient number, since it is larger than the sum of its proper divisors (2184017).

11981263 is an equidigital number, since it uses as much as digits as its factorization.

11981263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59057.

The product of its digits is 2592, while the sum is 31.

The square root of 11981263 is about 3461.3961056198. The cubic root of 11981263 is about 228.8236280451.

The spelling of 11981263 in words is "eleven million, nine hundred eighty-one thousand, two hundred sixty-three".