1422161 has 4 divisors (see below), whose sum is σ = 1531572. Its totient is φ = 1312752.

The previous prime is 1422133. The next prime is 1422163. The reversal of 1422161 is 1612241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1612241 = 47 ⋅34303.

It can be written as a sum of positive squares in 2 ways, for example, as 844561 + 577600 = 919^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1422161 - 2⁶ = 1422097 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422163) 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, 54686 + ... + 54711.

It is an arithmetic number, because the mean of its divisors is an integer number (382893).

2^1422161 is an apocalyptic number.

It is an amenable number.

1422161 is a deficient number, since it is larger than the sum of its proper divisors (109411).

1422161 is a wasteful number, since it uses less digits than its factorization.

1422161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109410.

The product of its digits is 96, while the sum is 17.

The square root of 1422161 is about 1192.5439195267. The cubic root of 1422161 is about 112.4560750331.

The spelling of 1422161 in words is "one million, four hundred twenty-two thousand, one hundred sixty-one".