1422561 has 8 divisors (see below), whose sum is σ = 2167744. Its totient is φ = 812880.

The previous prime is 1422541. The next prime is 1422563. The reversal of 1422561 is 1652241.

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

It is not a de Polignac number, because 1422561 - 2⁷ = 1422433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 67741 = 1422561 / (1 + 4 + 2 + 2 + 5 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1422563) 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 7 ways as a sum of consecutive naturals, for example, 33850 + ... + 33891.

It is an arithmetic number, because the mean of its divisors is an integer number (270968).

2^1422561 is an apocalyptic number.

It is an amenable number.

1422561 is a deficient number, since it is larger than the sum of its proper divisors (745183).

1422561 is an equidigital number, since it uses as much as digits as its factorization.

1422561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67751.

The product of its digits is 480, while the sum is 21.

The square root of 1422561 is about 1192.7116164438. The cubic root of 1422561 is about 112.4666172556.

The spelling of 1422561 in words is "one million, four hundred twenty-two thousand, five hundred sixty-one".