8121251 has 4 divisors (see below), whose sum is σ = 8150232. Its totient is φ = 8092272.

The previous prime is 8121209. The next prime is 8121283. The reversal of 8121251 is 1521218.

It is a happy number.

8121251 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8121251 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8121851) 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, 14066 + ... + 14631.

It is an arithmetic number, because the mean of its divisors is an integer number (2037558).

Almost surely, 2^8121251 is an apocalyptic number.

8121251 is a deficient number, since it is larger than the sum of its proper divisors (28981).

8121251 is a wasteful number, since it uses less digits than its factorization.

8121251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28980.

The product of its digits is 160, while the sum is 20.

The square root of 8121251 is about 2849.7808687687. The cubic root of 8121251 is about 201.0053627605.

Adding to 8121251 its reverse (1521218), we get a palindrome (9642469).

The spelling of 8121251 in words is "eight million, one hundred twenty-one thousand, two hundred fifty-one".