591406 has 4 divisors (see below), whose sum is σ = 887112. Its totient is φ = 295702.

The previous prime is 591403. The next prime is 591407. The reversal of 591406 is 604195.

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

It is a super-2 number, since 2×591406² = 699522113672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (591403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 147850 + ... + 147853.

It is an arithmetic number, because the mean of its divisors is an integer number (221778).

2⁵⁹¹⁴⁰⁶ is an apocalyptic number.

591406 is a deficient number, since it is larger than the sum of its proper divisors (295706).

591406 is a wasteful number, since it uses less digits than its factorization.

591406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295705.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 591406 is about 769.0292582210. The cubic root of 591406 is about 83.9386362113.

The spelling of 591406 in words is "five hundred ninety-one thousand, four hundred six".