12145730 has 8 divisors (see below), whose sum is σ = 21862332. Its totient is φ = 4858288.

The previous prime is 12145723. The next prime is 12145733. The reversal of 12145730 is 3754121.

It can be written as a sum of positive squares in 2 ways, for example, as 11015761 + 1129969 = 3319^2 + 1063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 12145696 and 12145705.

It is not an unprimeable number, because it can be changed into a prime (12145733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607277 + ... + 607296.

Almost surely, 2^12145730 is an apocalyptic number.

12145730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12145730 is a deficient number, since it is larger than the sum of its proper divisors (9716602).

12145730 is a wasteful number, since it uses less digits than its factorization.

12145730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214580.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12145730 is about 3485.0724526185. The cubic root of 12145730 is about 229.8658953586.

Adding to 12145730 its reverse (3754121), we get a palindrome (15899851).

The spelling of 12145730 in words is "twelve million, one hundred forty-five thousand, seven hundred thirty".