11981207 has 8 divisors (see below), whose sum is σ = 13736832. Its totient is φ = 10236600.

The previous prime is 11981201. The next prime is 11981231. The reversal of 11981207 is 70218911.

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 11981207 - 2¹⁰ = 11980183 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11981207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11981201) 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, 269 + ... + 4902.

It is an arithmetic number, because the mean of its divisors is an integer number (1717104).

Almost surely, 2^11981207 is an apocalyptic number.

11981207 is a deficient number, since it is larger than the sum of its proper divisors (1755625).

11981207 is an equidigital number, since it uses as much as digits as its factorization.

11981207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 11981207 is about 3461.3880163888. The cubic root of 11981207 is about 228.8232715400.

The spelling of 11981207 in words is "eleven million, nine hundred eighty-one thousand, two hundred seven".