12345345 has 32 divisors (see below), whose sum is σ = 23107200. Its totient is φ = 6236352.

The previous prime is 12345341. The next prime is 12345367. The reversal of 12345345 is 54354321.

12345345 is a `hidden beast` number, since 123 + 4 + 534 + 5 = 666.

It is not a de Polignac number, because 12345345 - 2² = 12345341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12345341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (722100).

It is a Proth number, since it is equal to 1507 ⋅ 2¹³ + 1 and 1507 < 2¹³.

Almost surely, 2^12345345 is an apocalyptic number.

12345345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12345345 is a deficient number, since it is larger than the sum of its proper divisors (10761855).

12345345 is a wasteful number, since it uses less digits than its factorization.

12345345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4840 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 12345345 is about 3513.5943135200. The cubic root of 12345345 is about 231.1183404437.

Adding to 12345345 its reverse (54354321), we get a palindrome (66699666).

The spelling of 12345345 in words is "twelve million, three hundred forty-five thousand, three hundred forty-five".