12345558 has 32 divisors (see below), whose sum is σ = 25555200. Its totient is φ = 3973536.

The previous prime is 12345547. The next prime is 12345559. The reversal of 12345558 is 85554321.

12345558 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×12345558³ (a number of 22 digits) contains 333 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12345559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27903 + ... + 28341.

It is an arithmetic number, because the mean of its divisors is an integer number (798600).

Almost surely, 2^12345558 is an apocalyptic number.

12345558 is an abundant number, since it is smaller than the sum of its proper divisors (13209642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12345558 is a wasteful number, since it uses less digits than its factorization.

12345558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596.

The product of its digits is 24000, while the sum is 33.

The square root of 12345558 is about 3513.6246242307. The cubic root of 12345558 is about 231.1196696336.

Adding to 12345558 its reverse (85554321), we get a palindrome (97899879).

The spelling of 12345558 in words is "twelve million, three hundred forty-five thousand, five hundred fifty-eight".