191012426 has 16 divisors (see below), whose sum is σ = 321014880. Its totient is φ = 84476880.

The previous prime is 191012417. The next prime is 191012431. The reversal of 191012426 is 624210191.

191012426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 191012395 and 191012404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116516 + ... + 118143.

It is an arithmetic number, because the mean of its divisors is an integer number (20063430).

Almost surely, 2^191012426 is an apocalyptic number.

191012426 is a deficient number, since it is larger than the sum of its proper divisors (130002454).

191012426 is a wasteful number, since it uses less digits than its factorization.

191012426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234709.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 191012426 is about 13820.7245106760. The cubic root of 191012426 is about 575.9090105920.

The spelling of 191012426 in words is "one hundred ninety-one million, twelve thousand, four hundred twenty-six".