12121534 has 8 divisors (see below), whose sum is σ = 18223128. Its totient is φ = 6047160.

The previous prime is 12121531. The next prime is 12121537. The reversal of 12121534 is 43512121.

It is an interprime number because it is at equal distance from previous prime (12121531) and next prime (12121537).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5652 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (2277891).

Almost surely, 2^12121534 is an apocalyptic number.

12121534 is a deficient number, since it is larger than the sum of its proper divisors (6101594).

12121534 is a wasteful number, since it uses less digits than its factorization.

12121534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13610.

The product of its digits is 240, while the sum is 19.

The square root of 12121534 is about 3481.5993451286. The cubic root of 12121534 is about 229.7131521692.

Adding to 12121534 its reverse (43512121), we get a palindrome (55633655).

The spelling of 12121534 in words is "twelve million, one hundred twenty-one thousand, five hundred thirty-four".