8121427 has 4 divisors (see below), whose sum is σ = 8599176. Its totient is φ = 7643680.

The previous prime is 8121419. The next prime is 8121431. The reversal of 8121427 is 7241218.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8121427 - 2³ = 8121419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (8121727) 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, 238849 + ... + 238882.

It is an arithmetic number, because the mean of its divisors is an integer number (2149794).

Almost surely, 2^8121427 is an apocalyptic number.

8121427 is a deficient number, since it is larger than the sum of its proper divisors (477749).

8121427 is a wasteful number, since it uses less digits than its factorization.

8121427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477748.

The product of its digits is 896, while the sum is 25.

The square root of 8121427 is about 2849.8117481686. The cubic root of 8121427 is about 201.0068147818.

The spelling of 8121427 in words is "eight million, one hundred twenty-one thousand, four hundred twenty-seven".