1406191 has 4 divisors (see below), whose sum is σ = 1451584. Its totient is φ = 1360800.

The previous prime is 1406173. The next prime is 1406213. The reversal of 1406191 is 1916041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1916041 = 97 ⋅19753.

It is a cyclic number.

It is not a de Polignac number, because 1406191 - 2⁵ = 1406159 is a prime.

It is a Duffinian number.

1406191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22650 + ... + 22711.

It is an arithmetic number, because the mean of its divisors is an integer number (362896).

2^1406191 is an apocalyptic number.

1406191 is a deficient number, since it is larger than the sum of its proper divisors (45393).

1406191 is an equidigital number, since it uses as much as digits as its factorization.

1406191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45392.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1406191 is about 1185.8292457179. The cubic root of 1406191 is about 112.0335518101.

The spelling of 1406191 in words is "one million, four hundred six thousand, one hundred ninety-one".