1421623 has 8 divisors (see below), whose sum is σ = 1662848. Its totient is φ = 1189944.

The previous prime is 1421621. The next prime is 1421627. The reversal of 1421623 is 3261241.

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

It is not a de Polignac number, because 1421623 - 2¹ = 1421621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1421623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421621) 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, 2061 + ... + 2662.

It is an arithmetic number, because the mean of its divisors is an integer number (207856).

2^1421623 is an apocalyptic number.

1421623 is a deficient number, since it is larger than the sum of its proper divisors (241225).

1421623 is an equidigital number, since it uses as much as digits as its factorization.

1421623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4773.

The product of its digits is 288, while the sum is 19.

The square root of 1421623 is about 1192.3183299774. The cubic root of 1421623 is about 112.4418926259.

Adding to 1421623 its reverse (3261241), we get a palindrome (4682864).

The spelling of 1421623 in words is "one million, four hundred twenty-one thousand, six hundred twenty-three".