12142521 has 16 divisors (see below), whose sum is σ = 18131520. Its totient is φ = 8030880.

The previous prime is 12142517. The next prime is 12142531. The reversal of 12142521 is 12524121.

12142521 is a `hidden beast` number, since 1 + 2 + 142 + 521 = 666.

12142521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12142521 - 2² = 12142517 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12142494 and 12142503.

It is not an unprimeable number, because it can be changed into a prime (12142511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821 + ... + 5253.

It is an arithmetic number, because the mean of its divisors is an integer number (1133220).

Almost surely, 2^12142521 is an apocalyptic number.

It is an amenable number.

12142521 is a deficient number, since it is larger than the sum of its proper divisors (5988999).

12142521 is a wasteful number, since it uses less digits than its factorization.

12142521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573 (or 3567 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12142521 is about 3484.6120300544. The cubic root of 12142521 is about 229.8456494332.

Adding to 12142521 its reverse (12524121), we get a palindrome (24666642).

The spelling of 12142521 in words is "twelve million, one hundred forty-two thousand, five hundred twenty-one".