1856423 has 4 divisors (see below), whose sum is σ = 1864368. Its totient is φ = 1848480.

The previous prime is 1856419. The next prime is 1856441. The reversal of 1856423 is 3246581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3246581 = 13 ⋅249737.

It is a cyclic number.

It is not a de Polignac number, because 1856423 - 2² = 1856419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1856443) 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, 3611 + ... + 4092.

It is an arithmetic number, because the mean of its divisors is an integer number (466092).

2^1856423 is an apocalyptic number.

1856423 is a deficient number, since it is larger than the sum of its proper divisors (7945).

1856423 is an equidigital number, since it uses as much as digits as its factorization.

1856423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944.

The product of its digits is 5760, while the sum is 29.

The square root of 1856423 is about 1362.5061467751. The cubic root of 1856423 is about 122.9020084534.

The spelling of 1856423 in words is "one million, eight hundred fifty-six thousand, four hundred twenty-three".