12251021 has 8 divisors (see below), whose sum is σ = 12718080. Its totient is φ = 11786992.

The previous prime is 12251011. The next prime is 12251039. The reversal of 12251021 is 12015221.

12251021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12251021 - 2¹⁴ = 12234637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12250987 and 12251005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251011) 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, 10556 + ... + 11658.

It is an arithmetic number, because the mean of its divisors is an integer number (1589760).

Almost surely, 2^12251021 is an apocalyptic number.

It is an amenable number.

12251021 is a deficient number, since it is larger than the sum of its proper divisors (467059).

12251021 is a wasteful number, since it uses less digits than its factorization.

12251021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12251021 is about 3500.1458541038. The cubic root of 12251021 is about 230.5282188542.

Adding to 12251021 its reverse (12015221), we get a palindrome (24266242).

The spelling of 12251021 in words is "twelve million, two hundred fifty-one thousand, twenty-one".