12145774 has 4 divisors (see below), whose sum is σ = 18218664. Its totient is φ = 6072886.

The previous prime is 12145759. The next prime is 12145781. The reversal of 12145774 is 47754121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47754121 = 1549 ⋅30829.

It is a congruent number.

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, 3036442 + ... + 3036445.

It is an arithmetic number, because the mean of its divisors is an integer number (4554666).

Almost surely, 2^12145774 is an apocalyptic number.

12145774 is a deficient number, since it is larger than the sum of its proper divisors (6072890).

12145774 is an equidigital number, since it uses as much as digits as its factorization.

12145774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6072889.

The product of its digits is 7840, while the sum is 31.

The square root of 12145774 is about 3485.0787652505. The cubic root of 12145774 is about 229.8661729346.

Adding to 12145774 its reverse (47754121), we get a palindrome (59899895).

The spelling of 12145774 in words is "twelve million, one hundred forty-five thousand, seven hundred seventy-four".