1422145 has 4 divisors (see below), whose sum is σ = 1706580. Its totient is φ = 1137712.

The previous prime is 1422133. The next prime is 1422163. The reversal of 1422145 is 5412241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5412241 = 29 ⋅186629.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 1227664 = 441^2 + 1108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1422145 is a prime.

1422145 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142210 + ... + 142219.

It is an arithmetic number, because the mean of its divisors is an integer number (426645).

2^1422145 is an apocalyptic number.

It is an amenable number.

1422145 is a deficient number, since it is larger than the sum of its proper divisors (284435).

1422145 is an equidigital number, since it uses as much as digits as its factorization.

1422145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284434.

The product of its digits is 320, while the sum is 19.

The square root of 1422145 is about 1192.5372111595. The cubic root of 1422145 is about 112.4556533030.

Adding to 1422145 its reverse (5412241), we get a palindrome (6834386).

It can be divided in two parts, 142 and 2145, that multiplied together give a triangular number (304590 = T₇₈₀).

The spelling of 1422145 in words is "one million, four hundred twenty-two thousand, one hundred forty-five".