1422147 has 4 divisors (see below), whose sum is σ = 1896200. Its totient is φ = 948096.

The previous prime is 1422133. The next prime is 1422163. The reversal of 1422147 is 7412241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1422147 - 2¹¹ = 1420099 is a prime.

It is a D-number.

It is a Duffinian number.

1422147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1422107) 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, 237022 + ... + 237027.

It is an arithmetic number, because the mean of its divisors is an integer number (474050).

2^1422147 is an apocalyptic number.

1422147 is a deficient number, since it is larger than the sum of its proper divisors (474053).

1422147 is an equidigital number, since it uses as much as digits as its factorization.

1422147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474052.

The product of its digits is 448, while the sum is 21.

The square root of 1422147 is about 1192.5380497074. The cubic root of 1422147 is about 112.4557060195.

Adding to 1422147 its reverse (7412241), we get a palindrome (8834388).

The spelling of 1422147 in words is "one million, four hundred twenty-two thousand, one hundred forty-seven".