1423811 has 4 divisors (see below), whose sum is σ = 1426224. Its totient is φ = 1421400.

The previous prime is 1423789. The next prime is 1423819. The reversal of 1423811 is 1183241.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1423811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423819) 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, 341 + ... + 1721.

It is an arithmetic number, because the mean of its divisors is an integer number (356556).

2^1423811 is an apocalyptic number.

1423811 is a deficient number, since it is larger than the sum of its proper divisors (2413).

1423811 is a wasteful number, since it uses less digits than its factorization.

1423811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412.

The product of its digits is 192, while the sum is 20.

The square root of 1423811 is about 1193.2355174064. The cubic root of 1423811 is about 112.4995489694.

The spelling of 1423811 in words is "one million, four hundred twenty-three thousand, eight hundred eleven".