123821066 has 8 divisors (see below), whose sum is σ = 190261764. Its totient is φ = 60400480.

The previous prime is 123821059. The next prime is 123821083. The reversal of 123821066 is 660128321.

It can be written as a sum of positive squares in 2 ways, for example, as 82283041 + 41538025 = 9071^2 + 6445^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×123821066³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754925 + ... + 755088.

Almost surely, 2^123821066 is an apocalyptic number.

123821066 is a deficient number, since it is larger than the sum of its proper divisors (66440698).

123821066 is a wasteful number, since it uses less digits than its factorization.

123821066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510056.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 123821066 is about 11127.4914513560. The cubic root of 123821066 is about 498.4231201277.

Adding to 123821066 its reverse (660128321), we get a palindrome (783949387).

The spelling of 123821066 in words is "one hundred twenty-three million, eight hundred twenty-one thousand, sixty-six".