8242905 has 16 divisors (see below), whose sum is σ = 14387904. Its totient is φ = 3996480.

The previous prime is 8242889. The next prime is 8242919. The reversal of 8242905 is 5092428.

It is not a de Polignac number, because 8242905 - 2⁴ = 8242889 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24814 + ... + 25143.

It is an arithmetic number, because the mean of its divisors is an integer number (899244).

Almost surely, 2^8242905 is an apocalyptic number.

It is an amenable number.

8242905 is a deficient number, since it is larger than the sum of its proper divisors (6144999).

8242905 is a wasteful number, since it uses less digits than its factorization.

8242905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49976.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 8242905 is about 2871.0459766434. The cubic root of 8242905 is about 202.0040599779.

The spelling of 8242905 in words is "eight million, two hundred forty-two thousand, nine hundred five".