427 has 4 divisors (see below), whose sum is σ = 496. Its totient is φ = 360.

The previous prime is 421. The next prime is 431. The reversal of 427 is 724.

427 is nontrivially palindromic in base 2 and base 6.

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 427 - 2^{3} = 419 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 42 and 7 contains 427 itself.

It is a Duffinian number.

427 is a lucky number.

It is a plaindrome in base 4, base 11, base 13, base 14 and base 16.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (421) 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, 24 + ... + 37.

It is an arithmetic number, because the mean of its divisors is an integer number (124).

427 is a deficient number, since it is larger than the sum of its proper divisors (69).

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

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

The sum of its prime factors is 68.

The product of its digits is 56, while the sum is 13.

The square root of 427 is about 20.6639783198. The cubic root of 427 is about 7.5302482125.

Subtracting from 427 its sum of digits (13), we obtain a palindrome (414).

It can be divided in two parts, 42 and 7, that added together give a square (49 = 7^{2}).

The spelling of 427 in words is "four hundred twenty-seven", and thus it is an aban number and an iban number.

• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.079 sec. • engine limits •