4139191 has 8 divisors (see below), whose sum is σ = 4743584. Its totient is φ = 3538080.

The previous prime is 4139189. The next prime is 4139203. The reversal of 4139191 is 1919314.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4139191 - 2¹ = 4139189 is a prime.

It is an Ulam number.

It is the 2035-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4139101) by changing a digit.

It is a nontrivial repunit in base 2034.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3241 + ... + 4333.

It is an arithmetic number, because the mean of its divisors is an integer number (592948).

Almost surely, 2^4139191 is an apocalyptic number.

4139191 is a deficient number, since it is larger than the sum of its proper divisors (604393).

4139191 is a wasteful number, since it uses less digits than its factorization.

4139191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641.

The product of its digits is 972, while the sum is 28.

The square root of 4139191 is about 2034.5001843205. The cubic root of 4139191 is about 160.5604175964.

It can be divided in two parts, 413 and 9191, that added together give a square (9604 = 98²).

The spelling of 4139191 in words is "four million, one hundred thirty-nine thousand, one hundred ninety-one".