12021634 has 4 divisors (see below), whose sum is σ = 18032454. Its totient is φ = 6010816.

The previous prime is 12021629. The next prime is 12021641. The reversal of 12021634 is 43612021.

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

It can be written as a sum of positive squares in only one way, i.e., 8392609 + 3629025 = 2897^2 + 1905^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005407 + ... + 3005410.

Almost surely, 2^12021634 is an apocalyptic number.

12021634 is a deficient number, since it is larger than the sum of its proper divisors (6010820).

12021634 is an equidigital number, since it uses as much as digits as its factorization.

12021634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010819.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 12021634 is about 3467.2228079545. Note that the first 3 decimals coincide. The cubic root of 12021634 is about 229.0803478472.

Adding to 12021634 its reverse (43612021), we get a palindrome (55633655).

The spelling of 12021634 in words is "twelve million, twenty-one thousand, six hundred thirty-four".