12136521 has 8 divisors (see below), whose sum is σ = 17133984. Its totient is φ = 7615040.

The previous prime is 12136517. The next prime is 12136547. The reversal of 12136521 is 12563121.

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

It is a cyclic number.

It is not a de Polignac number, because 12136521 - 2² = 12136517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12136561) 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, 118935 + ... + 119036.

It is an arithmetic number, because the mean of its divisors is an integer number (2141748).

Almost surely, 2^12136521 is an apocalyptic number.

It is an amenable number.

12136521 is a deficient number, since it is larger than the sum of its proper divisors (4997463).

12136521 is a wasteful number, since it uses less digits than its factorization.

12136521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237991.

The product of its digits is 360, while the sum is 21.

The square root of 12136521 is about 3483.7509956942. The cubic root of 12136521 is about 229.8077852174.

Adding to 12136521 its reverse (12563121), we get a palindrome (24699642).

The spelling of 12136521 in words is "twelve million, one hundred thirty-six thousand, five hundred twenty-one".