427749 has 8 divisors (see below), whose sum is σ = 651840. Its totient is φ = 244416.

The previous prime is 427733. The next prime is 427751. The reversal of 427749 is 947724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427749 - 2⁴ = 427733 is a prime.

It is a Curzon number.

427749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10164 + ... + 10205.

It is an arithmetic number, because the mean of its divisors is an integer number (81480).

2⁴²⁷⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

427749 is a deficient number, since it is larger than the sum of its proper divisors (224091).

427749 is a wasteful number, since it uses less digits than its factorization.

427749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20379.

The product of its digits is 14112, while the sum is 33.

The square root of 427749 is about 654.0252288712. The cubic root of 427749 is about 75.3464857258.

Subtracting from 427749 its sum of digits (33), we obtain a square (427716 = 654²).

It can be divided in two parts, 427 and 749, that added together give a triangular number (1176 = T₄₈).

The spelling of 427749 in words is "four hundred twenty-seven thousand, seven hundred forty-nine".