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74431 = 7431
BaseRepresentation
bin10010001010111111
310210002201
4102022333
54340211
61332331
7430000
oct221277
9123081
1074431
1150a15
12370a7
1327b56
141d1a7
15170c1
hex122bf

74431 has 10 divisors (see below), whose sum is σ = 89632. Its totient is φ = 61740.

The previous prime is 74419. The next prime is 74441. The reversal of 74431 is 13447.

Adding to 74431 its reverse (13447), we get a palindrome (87878).

It can be divided in two parts, 74 and 431, that added together give a palindrome (505).

It is a happy number.

74431 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 74431 - 211 = 72383 is a prime.

It is a super-2 number, since 2×744312 = 11079947522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a nialpdrome in base 7 and base 10.

It is a junction number, because it is equal to n+sod(n) for n = 74399 and 74408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74411) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2386 + ... + 2416.

274431 is an apocalyptic number.

74431 is a deficient number, since it is larger than the sum of its proper divisors (15201).

74431 is an frugal number, since it uses more digits than its factorization.

74431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 38 counting only the distinct ones).

The product of its digits is 336, while the sum is 19.

The square root of 74431 is about 272.8204537787. The cubic root of 74431 is about 42.0647150484.

The spelling of 74431 in words is "seventy-four thousand, four hundred thirty-one".

Divisors: 1 7 31 49 217 343 1519 2401 10633 74431