12145522 has 16 divisors (see below), whose sum is σ = 19625760. Its totient is φ = 5618592.

The previous prime is 12145513. The next prime is 12145537. The reversal of 12145522 is 22554121.

It is a junction number, because it is equal to n+sod(n) for n = 12145493 and 12145502.

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 in 7 ways as a sum of consecutive naturals, for example, 2083 + ... + 5350.

It is an arithmetic number, because the mean of its divisors is an integer number (1226610).

Almost surely, 2^12145522 is an apocalyptic number.

12145522 is a deficient number, since it is larger than the sum of its proper divisors (7480238).

12145522 is a wasteful number, since it uses less digits than its factorization.

12145522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7497.

The product of its digits is 800, while the sum is 22.

The square root of 12145522 is about 3485.0426109303. The cubic root of 12145522 is about 229.8645831724.

Adding to 12145522 its reverse (22554121), we get a palindrome (34699643).

The spelling of 12145522 in words is "twelve million, one hundred forty-five thousand, five hundred twenty-two".