1426391 has 4 divisors (see below), whose sum is σ = 1488432. Its totient is φ = 1364352.

The previous prime is 1426379. The next prime is 1426393. The reversal of 1426391 is 1936241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1936241 = 71 ⋅27271.

It is a cyclic number.

It is not a de Polignac number, because 1426391 - 2¹⁰ = 1425367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1426391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1426393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30986 + ... + 31031.

It is an arithmetic number, because the mean of its divisors is an integer number (372108).

2^1426391 is an apocalyptic number.

1426391 is a deficient number, since it is larger than the sum of its proper divisors (62041).

1426391 is an equidigital number, since it uses as much as digits as its factorization.

1426391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62040.

The product of its digits is 1296, while the sum is 26.

The square root of 1426391 is about 1194.3161223060. The cubic root of 1426391 is about 112.5674591294.

The spelling of 1426391 in words is "one million, four hundred twenty-six thousand, three hundred ninety-one".