8121902 has 4 divisors (see below), whose sum is σ = 12182856. Its totient is φ = 4060950.

The previous prime is 8121901. The next prime is 8121923. The reversal of 8121902 is 2091218.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8121901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2030474 + ... + 2030477.

It is an arithmetic number, because the mean of its divisors is an integer number (3045714).

Almost surely, 2^8121902 is an apocalyptic number.

8121902 is a deficient number, since it is larger than the sum of its proper divisors (4060954).

8121902 is a wasteful number, since it uses less digits than its factorization.

8121902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060953.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 8121902 is about 2849.8950857882. The cubic root of 8121902 is about 201.0107334846.

The spelling of 8121902 in words is "eight million, one hundred twenty-one thousand, nine hundred two".