1427289 has 4 divisors (see below), whose sum is σ = 1903056. Its totient is φ = 951524.

The previous prime is 1427281. The next prime is 1427291. The reversal of 1427289 is 9827241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1427289 - 2³ = 1427281 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1427281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237879 + ... + 237884.

It is an arithmetic number, because the mean of its divisors is an integer number (475764).

2^1427289 is an apocalyptic number.

It is an amenable number.

1427289 is a deficient number, since it is larger than the sum of its proper divisors (475767).

1427289 is an equidigital number, since it uses as much as digits as its factorization.

1427289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475766.

The product of its digits is 8064, while the sum is 33.

The square root of 1427289 is about 1194.6920105199. The cubic root of 1427289 is about 112.5910768641.

The spelling of 1427289 in words is "one million, four hundred twenty-seven thousand, two hundred eighty-nine".