12521042 has 4 divisors (see below), whose sum is σ = 18781566. Its totient is φ = 6260520.

The previous prime is 12521021. The next prime is 12521053. The reversal of 12521042 is 24012521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24012521 = 13 ⋅1847117.

It can be written as a sum of positive squares in only one way, i.e., 8404201 + 4116841 = 2899^2 + 2029^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12521042.

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, 3130259 + ... + 3130262.

Almost surely, 2^12521042 is an apocalyptic number.

12521042 is a deficient number, since it is larger than the sum of its proper divisors (6260524).

12521042 is an equidigital number, since it uses as much as digits as its factorization.

12521042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6260523.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 12521042 is about 3538.5084428329. The cubic root of 12521042 is about 232.2095930937.

Adding to 12521042 its reverse (24012521), we get a palindrome (36533563).

The spelling of 12521042 in words is "twelve million, five hundred twenty-one thousand, forty-two".