1391427 has 24 divisors (see below), whose sum is σ = 2163200. Its totient is φ = 859248.

The previous prime is 1391419. The next prime is 1391441. The reversal of 1391427 is 7241931.

It is not a de Polignac number, because 1391427 - 2³ = 1391419 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 1391427.

It is not an unprimeable number, because it can be changed into a prime (1391407) 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 23 ways as a sum of consecutive naturals, for example, 13458 + ... + 13560.

2^1391427 is an apocalyptic number.

1391427 is a deficient number, since it is larger than the sum of its proper divisors (771773).

1391427 is a wasteful number, since it uses less digits than its factorization.

1391427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 204 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 1391427 is about 1179.5876398132. The cubic root of 1391427 is about 111.6400807974.

The spelling of 1391427 in words is "one million, three hundred ninety-one thousand, four hundred twenty-seven".