427489 has 4 divisors (see below), whose sum is σ = 442260. Its totient is φ = 412720.

The previous prime is 427477. The next prime is 427513. The reversal of 427489 is 984724.

427489 = T₁₅₇ + T₁₅₈ + ... + T₁₈₅.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 342225 + 85264 = 585^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 427489 - 2⁵ = 427457 is a prime.

It is a Duffinian number.

427489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (427429) 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, 7342 + ... + 7399.

It is an arithmetic number, because the mean of its divisors is an integer number (110565).

2⁴²⁷⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

427489 is a deficient number, since it is larger than the sum of its proper divisors (14771).

427489 is a wasteful number, since it uses less digits than its factorization.

427489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14770.

The product of its digits is 16128, while the sum is 34.

The square root of 427489 is about 653.8264295667. The cubic root of 427489 is about 75.3312166024.

The spelling of 427489 in words is "four hundred twenty-seven thousand, four hundred eighty-nine".