712091 has 4 divisors (see below), whose sum is σ = 714000. Its totient is φ = 710184.

The previous prime is 712067. The next prime is 712093. The reversal of 712091 is 190217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712093) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 191 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (178500).

2⁷¹²⁰⁹¹ is an apocalyptic number.

712091 is a deficient number, since it is larger than the sum of its proper divisors (1909).

712091 is a wasteful number, since it uses less digits than its factorization.

712091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 712091 is about 843.8548453378. The cubic root of 712091 is about 89.2987059800.

Adding to 712091 its product of nonzero digits (126), we get a palindrome (712217).

The spelling of 712091 in words is "seven hundred twelve thousand, ninety-one".