1591427 has 4 divisors (see below), whose sum is σ = 1600800. Its totient is φ = 1582056.

The previous prime is 1591417. The next prime is 1591441. The reversal of 1591427 is 7241951.

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

It is a cyclic number.

It is not a de Polignac number, because 1591427 - 2⁶ = 1591363 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 1591427.

It is not an unprimeable number, because it can be changed into a prime (1591417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4427 + ... + 4772.

It is an arithmetic number, because the mean of its divisors is an integer number (400200).

2^1591427 is an apocalyptic number.

1591427 is a deficient number, since it is larger than the sum of its proper divisors (9373).

1591427 is an equidigital number, since it uses as much as digits as its factorization.

1591427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9372.

The product of its digits is 2520, while the sum is 29.

The square root of 1591427 is about 1261.5177366966. The cubic root of 1591427 is about 116.7514386151.

The spelling of 1591427 in words is "one million, five hundred ninety-one thousand, four hundred twenty-seven".