8166121 has 4 divisors (see below), whose sum is σ = 8264592. Its totient is φ = 8067652.

The previous prime is 8166107. The next prime is 8166209. The reversal of 8166121 is 1216618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8166121 - 2⁹ = 8165609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8161121) 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, 49111 + ... + 49276.

It is an arithmetic number, because the mean of its divisors is an integer number (2066148).

Almost surely, 2^8166121 is an apocalyptic number.

It is an amenable number.

8166121 is a deficient number, since it is larger than the sum of its proper divisors (98471).

8166121 is an equidigital number, since it uses as much as digits as its factorization.

8166121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98470.

The product of its digits is 576, while the sum is 25.

The square root of 8166121 is about 2857.6425598734. The cubic root of 8166121 is about 201.3748686899.

The spelling of 8166121 in words is "eight million, one hundred sixty-six thousand, one hundred twenty-one".