1423561 has 4 divisors (see below), whose sum is σ = 1458324. Its totient is φ = 1388800.

The previous prime is 1423553. The next prime is 1423579. The reversal of 1423561 is 1653241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1653241 = 227 ⋅7283.

It can be written as a sum of positive squares in 2 ways, for example, as 383161 + 1040400 = 619^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423561 - 2³ = 1423553 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1423561 is a lucky 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17320 + ... + 17401.

It is an arithmetic number, because the mean of its divisors is an integer number (364581).

2^1423561 is an apocalyptic number.

It is an amenable number.

1423561 is a deficient number, since it is larger than the sum of its proper divisors (34763).

1423561 is an equidigital number, since it uses as much as digits as its factorization.

1423561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34762.

The product of its digits is 720, while the sum is 22.

The square root of 1423561 is about 1193.1307556173. The cubic root of 1423561 is about 112.4929641690.

The spelling of 1423561 in words is "one million, four hundred twenty-three thousand, five hundred sixty-one".