11901806 has 12 divisors (see below), whose sum is σ = 20767608. Its totient is φ = 5100732.

The previous prime is 11901781. The next prime is 11901811. The reversal of 11901806 is 60810911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 60626 + ... + 60821.

It is an arithmetic number, because the mean of its divisors is an integer number (1730634).

Almost surely, 2^11901806 is an apocalyptic number.

11901806 is a deficient number, since it is larger than the sum of its proper divisors (8865802).

11901806 is a wasteful number, since it uses less digits than its factorization.

11901806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121463 (or 121456 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 11901806 is about 3449.8994188237. The cubic root of 11901806 is about 228.3166703642.

The spelling of 11901806 in words is "eleven million, nine hundred one thousand, eight hundred six".