123402404 has 6 divisors (see below), whose sum is σ = 215954214. Its totient is φ = 61701200.

The previous prime is 123402403. The next prime is 123402407. The reversal of 123402404 is 404204321.

It can be written as a sum of positive squares in only one way, i.e., 65642404 + 57760000 = 8102^2 + 7600^2 .

It is not an unprimeable number, because it can be changed into a prime (123402403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15425297 + ... + 15425304.

It is an arithmetic number, because the mean of its divisors is an integer number (35992369).

Almost surely, 2^123402404 is an apocalyptic number.

It is an amenable number.

123402404 is a deficient number, since it is larger than the sum of its proper divisors (92551810).

123402404 is a wasteful number, since it uses less digits than its factorization.

123402404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30850605 (or 30850603 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 123402404 is about 11108.6634659621. The cubic root of 123402404 is about 497.8607321196.

Adding to 123402404 its reverse (404204321), we get a palindrome (527606725).

The spelling of 123402404 in words is "one hundred twenty-three million, four hundred two thousand, four hundred four".