12145634 has 4 divisors (see below), whose sum is σ = 18218454. Its totient is φ = 6072816.

The previous prime is 12145607. The next prime is 12145669. The reversal of 12145634 is 43654121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43654121 = 7 ⋅6236303.

It can be written as a sum of positive squares in only one way, i.e., 6265009 + 5880625 = 2503^2 + 2425^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3036407 + ... + 3036410.

Almost surely, 2^12145634 is an apocalyptic number.

12145634 is a deficient number, since it is larger than the sum of its proper divisors (6072820).

12145634 is an equidigital number, since it uses as much as digits as its factorization.

12145634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072819.

The product of its digits is 2880, while the sum is 26.

The square root of 12145634 is about 3485.0586795634. The cubic root of 12145634 is about 229.8652897361.

Adding to 12145634 its reverse (43654121), we get a palindrome (55799755).

The spelling of 12145634 in words is "twelve million, one hundred forty-five thousand, six hundred thirty-four".