12145428 has 36 divisors (see below), whose sum is σ = 31694208. Its totient is φ = 3917520.

The previous prime is 12145417. The next prime is 12145433. The reversal of 12145428 is 82454121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×12145428² = 295022842606368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4326 + ... + 6557.

Almost surely, 2^12145428 is an apocalyptic number.

12145428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12145428 is an abundant number, since it is smaller than the sum of its proper divisors (19548780).

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

12145428 is a wasteful number, since it uses less digits than its factorization.

12145428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10924 (or 10919 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 12145428 is about 3485.0291246990. The cubic root of 12145428 is about 229.8639901602.

Adding to 12145428 its reverse (82454121), we get a palindrome (94599549).

The spelling of 12145428 in words is "twelve million, one hundred forty-five thousand, four hundred twenty-eight".