11971426 has 16 divisors (see below), whose sum is σ = 18678240. Its totient is φ = 5749920.

The previous prime is 11971411. The next prime is 11971439. The reversal of 11971426 is 62417911.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4405 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (1167390).

Almost surely, 2^11971426 is an apocalyptic number.

11971426 is a deficient number, since it is larger than the sum of its proper divisors (6706814).

11971426 is a wasteful number, since it uses less digits than its factorization.

11971426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289.

The product of its digits is 3024, while the sum is 31.

The square root of 11971426 is about 3459.9748554000. The cubic root of 11971426 is about 228.7609870602.

The spelling of 11971426 in words is "eleven million, nine hundred seventy-one thousand, four hundred twenty-six".