123020404 has 24 divisors (see below), whose sum is σ = 232622208. Its totient is φ = 56588640.

The previous prime is 123020389. The next prime is 123020413. The reversal of 123020404 is 404020321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12369 + ... + 19975.

It is an arithmetic number, because the mean of its divisors is an integer number (9692592).

Almost surely, 2^123020404 is an apocalyptic number.

It is an amenable number.

123020404 is a deficient number, since it is larger than the sum of its proper divisors (109601804).

123020404 is a wasteful number, since it uses less digits than its factorization.

123020404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7935 (or 7933 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 123020404 is about 11091.4563516249. The cubic root of 123020404 is about 497.3464812550.

Adding to 123020404 its reverse (404020321), we get a palindrome (527040725).

It can be divided in two parts, 12302040 and 4, that multiplied together give a triangular number (49208160 = T₉₉₂₀).

The spelling of 123020404 in words is "one hundred twenty-three million, twenty thousand, four hundred four".