12121634 has 16 divisors (see below), whose sum is σ = 20932800. Its totient is φ = 5156784.

The previous prime is 12121631. The next prime is 12121661. The reversal of 12121634 is 43612121.

12121634 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

12121634 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12121631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1169 + ... + 5060.

It is an arithmetic number, because the mean of its divisors is an integer number (1308300).

Almost surely, 2^12121634 is an apocalyptic number.

12121634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12121634 is a deficient number, since it is larger than the sum of its proper divisors (8811166).

12121634 is a wasteful number, since it uses less digits than its factorization.

12121634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6377.

The product of its digits is 288, while the sum is 20.

The square root of 12121634 is about 3481.6137063149. The cubic root of 12121634 is about 229.7137838618.

Adding to 12121634 its reverse (43612121), we get a palindrome (55733755).

The spelling of 12121634 in words is "twelve million, one hundred twenty-one thousand, six hundred thirty-four".