12858431 has 2 divisors, whose sum is σ = 12858432. Its totient is φ = 12858430.

The previous prime is 12858427. The next prime is 12858437. The reversal of 12858431 is 13485821.

12858431 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13485821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12858431 - 2² = 12858427 is a prime.

It is a super-2 number, since 2×12858431² = 330678495563522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12858437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6429215 + 6429216.

It is an arithmetic number, because the mean of its divisors is an integer number (6429216).

Almost surely, 2^12858431 is an apocalyptic number.

12858431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12858431 is an equidigital number, since it uses as much as digits as its factorization.

12858431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 32.

The square root of 12858431 is about 3585.8654464439. The cubic root of 12858431 is about 234.2768231414.

The spelling of 12858431 in words is "twelve million, eight hundred fifty-eight thousand, four hundred thirty-one".