12145427 has 16 divisors (see below), whose sum is σ = 14895360. Its totient is φ = 9670752.

The previous prime is 12145417. The next prime is 12145433. The reversal of 12145427 is 72454121.

12145427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12145427 - 2¹⁰ = 12144403 is a prime.

It is a super-2 number, since 2×12145427² = 295022794024658, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12145396 and 12145405.

It is not an unprimeable number, because it can be changed into a prime (12145417) 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, 6188 + ... + 7910.

It is an arithmetic number, because the mean of its divisors is an integer number (930960).

Almost surely, 2^12145427 is an apocalyptic number.

12145427 is a deficient number, since it is larger than the sum of its proper divisors (2749933).

12145427 is a wasteful number, since it uses less digits than its factorization.

12145427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802.

The product of its digits is 2240, while the sum is 26.

The square root of 12145427 is about 3485.0289812281. The cubic root of 12145427 is about 229.8639838516.

Adding to 12145427 its reverse (72454121), we get a palindrome (84599548).

The spelling of 12145427 in words is "twelve million, one hundred forty-five thousand, four hundred twenty-seven".