12121394 has 8 divisors (see below), whose sum is σ = 18569088. Its totient is φ = 5931700.

The previous prime is 12121393. The next prime is 12121423. The reversal of 12121394 is 49312121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12121393) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 64382 + ... + 64569.

It is an arithmetic number, because the mean of its divisors is an integer number (2321136).

Almost surely, 2^12121394 is an apocalyptic number.

12121394 is a deficient number, since it is larger than the sum of its proper divisors (6447694).

12121394 is a wasteful number, since it uses less digits than its factorization.

12121394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129000.

The product of its digits is 432, while the sum is 23.

The square root of 12121394 is about 3481.5792393682. The cubic root of 12121394 is about 229.7122677936.

The spelling of 12121394 in words is "twelve million, one hundred twenty-one thousand, three hundred ninety-four".