8121630 has 32 divisors (see below), whose sum is σ = 21264768. Its totient is φ = 1968800.

The previous prime is 8121629. The next prime is 8121643. The reversal of 8121630 is 361218.

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

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 8121597 and 8121606.

It is a congruent 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, 11976 + ... + 12635.

It is an arithmetic number, because the mean of its divisors is an integer number (664524).

Almost surely, 2^8121630 is an apocalyptic number.

8121630 is an abundant number, since it is smaller than the sum of its proper divisors (13143138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8121630 is a wasteful number, since it uses less digits than its factorization.

8121630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24632.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 8121630 is about 2849.8473643337. The cubic root of 8121630 is about 201.0084895303.

Adding to 8121630 its reverse (361218), we get a palindrome (8482848).

It can be divided in two parts, 812 and 1630, that added together give a palindrome (2442).

The spelling of 8121630 in words is "eight million, one hundred twenty-one thousand, six hundred thirty".