1422391 has 6 divisors (see below), whose sum is σ = 1463280. Its totient is φ = 1382616.

The previous prime is 1422367. The next prime is 1422409. The reversal of 1422391 is 1932241.

It is not a de Polignac number, because 1422391 - 2¹⁵ = 1389623 is a prime.

It is a super-3 number, since 3×1422391³ = 8633328014346367413, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1422191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850 + ... + 1888.

It is an arithmetic number, because the mean of its divisors is an integer number (243880).

2^1422391 is an apocalyptic number.

1422391 is a deficient number, since it is larger than the sum of its proper divisors (40889).

1422391 is an equidigital number, since it uses as much as digits as its factorization.

1422391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1076 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

The square root of 1422391 is about 1192.6403481352. The cubic root of 1422391 is about 112.4621370525.

The spelling of 1422391 in words is "one million, four hundred twenty-two thousand, three hundred ninety-one".