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7427 = 71061

7427 has 4 divisors (see below), whose sum is σ = 8496. Its totient is φ = 6360.

The previous prime is 7417. The next prime is 7433. The reversal of 7427 is 7247.

Adding to 7427 its sum of digits (20), we get a palindrome (7447).

It can be divided in two parts, 74 and 27, that added together give a palindrome (101).

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 7427 - 24 = 7411 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7399 and 7408.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 7427.

It is not an unprimeable number, because it can be changed into a prime (7417) 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, 524 + ... + 537.

It is an arithmetic number, because the mean of its divisors is an integer number (2124).

27427 is an apocalyptic number.

7427 is a deficient number, since it is larger than the sum of its proper divisors (1069).

7427 is a wasteful number, since it uses less digits than its factorization.

7427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its digits is 392, while the sum is 20.

The square root of 7427 is about 86.1800440937. The cubic root of 7427 is about 19.5106231838.

The spelling of 7427 in words is "seven thousand, four hundred twenty-seven", and thus it is an iban number.

Divisors: 1 7 1061 7427