1423643 has 8 divisors (see below), whose sum is σ = 1571136. Its totient is φ = 1281600.

The previous prime is 1423637. The next prime is 1423663. The reversal of 1423643 is 3463241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1423643 - 2⁴ = 1423627 is a prime.

It is a d-powerful number, because it can be written as 1 + 4³ + 2¹⁹ + 3¹⁰ + 6⁶ + 4⁹ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803 + ... + 1868.

It is an arithmetic number, because the mean of its divisors is an integer number (196392).

2^1423643 is an apocalyptic number.

1423643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1423643 is a deficient number, since it is larger than the sum of its proper divisors (147493).

1423643 is a wasteful number, since it uses less digits than its factorization.

1423643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725.

The product of its digits is 1728, while the sum is 23.

The square root of 1423643 is about 1193.1651184979. The cubic root of 1423643 is about 112.4951240685.

Adding to 1423643 its reverse (3463241), we get a palindrome (4886884).

The spelling of 1423643 in words is "one million, four hundred twenty-three thousand, six hundred forty-three".