8121650 has 24 divisors (see below), whose sum is σ = 15237120. Its totient is φ = 3220560.

The previous prime is 8121643. The next prime is 8121671. The reversal of 8121650 is 561218.

It is a super-2 number, since 2×8121650² = 131922397445000, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5711 + ... + 6989.

It is an arithmetic number, because the mean of its divisors is an integer number (634880).

Almost surely, 2^8121650 is an apocalyptic number.

8121650 is a deficient number, since it is larger than the sum of its proper divisors (7115470).

8121650 is a wasteful number, since it uses less digits than its factorization.

8121650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 8121650 is about 2849.8508732914. The cubic root of 8121650 is about 201.0086545286.

Adding to 8121650 its reverse (561218), we get a palindrome (8682868).

The spelling of 8121650 in words is "eight million, one hundred twenty-one thousand, six hundred fifty".