1423591 has 4 divisors (see below), whose sum is σ = 1533112. Its totient is φ = 1314072.

The previous prime is 1423589. The next prime is 1423603. The reversal of 1423591 is 1953241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1953241 = 149 ⋅13109.

It is a cyclic number.

It is not a de Polignac number, because 1423591 - 2¹ = 1423589 is a prime.

It is a super-2 number, since 2×1423591² = 4053222670562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423511) 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, 54741 + ... + 54766.

It is an arithmetic number, because the mean of its divisors is an integer number (383278).

2^1423591 is an apocalyptic number.

1423591 is a deficient number, since it is larger than the sum of its proper divisors (109521).

1423591 is a wasteful number, since it uses less digits than its factorization.

1423591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109520.

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

The square root of 1423591 is about 1193.1433275177. The cubic root of 1423591 is about 112.4937543858.

The spelling of 1423591 in words is "one million, four hundred twenty-three thousand, five hundred ninety-one".