12521822 has 4 divisors (see below), whose sum is σ = 18782736. Its totient is φ = 6260910.

The previous prime is 12521801. The next prime is 12521837. The reversal of 12521822 is 22812521.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3130454 + ... + 3130457.

It is an arithmetic number, because the mean of its divisors is an integer number (4695684).

Almost surely, 2^12521822 is an apocalyptic number.

12521822 is a deficient number, since it is larger than the sum of its proper divisors (6260914).

12521822 is an equidigital number, since it uses as much as digits as its factorization.

12521822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6260913.

The product of its digits is 640, while the sum is 23.

The square root of 12521822 is about 3538.6186570468. The cubic root of 12521822 is about 232.2144148362.

The spelling of 12521822 in words is "twelve million, five hundred twenty-one thousand, eight hundred twenty-two".