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12404231 = 71772033
BaseRepresentation
bin101111010100…
…011000000111
3212100012101222
4233110120013
511133413411
61121510555
7210301640
oct57243007
925305358
1012404231
117002534
1241a245b
132753ca8
14190c6c7
1511504db
hexbd4607

12404231 has 4 divisors (see below), whose sum is σ = 14176272. Its totient is φ = 10632192.

The previous prime is 12404201. The next prime is 12404269. The reversal of 12404231 is 13240421.

12404231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12404231 - 214 = 12387847 is a prime.

It is a super-2 number, since 2×124042312 = 307729893402722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12404201) 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, 886010 + ... + 886023.

It is an arithmetic number, because the mean of its divisors is an integer number (3544068).

Almost surely, 212404231 is an apocalyptic number.

12404231 is a deficient number, since it is larger than the sum of its proper divisors (1772041).

12404231 is an equidigital number, since it uses as much as digits as its factorization.

12404231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772040.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 12404231 is about 3521.9640827243. The cubic root of 12404231 is about 231.4852277985.

Adding to 12404231 its reverse (13240421), we get a palindrome (25644652).

The spelling of 12404231 in words is "twelve million, four hundred four thousand, two hundred thirty-one".

Divisors: 1 7 1772033 12404231