191042534 has 16 divisors (see below), whose sum is σ = 294670656. Its totient is φ = 92836800.

The previous prime is 191042497. The next prime is 191042557. The reversal of 191042534 is 435240191.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 191042497 and 191042506.

It is a congruent number.

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, 17924 + ... + 26520.

It is an arithmetic number, because the mean of its divisors is an integer number (18416916).

Almost surely, 2^191042534 is an apocalyptic number.

191042534 is a deficient number, since it is larger than the sum of its proper divisors (103628122).

191042534 is a wasteful number, since it uses less digits than its factorization.

191042534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8911.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 191042534 is about 13821.8137015371. The cubic root of 191042534 is about 575.9392678863.

It can be divided in two parts, 1910 and 42534, that added together give a palindrome (44444).

The spelling of 191042534 in words is "one hundred ninety-one million, forty-two thousand, five hundred thirty-four".