123473421 has 12 divisors (see below), whose sum is σ = 179017020. Its totient is φ = 82008000.

The previous prime is 123473401. The next prime is 123473437. The reversal of 123473421 is 124374321.

It is a happy number.

123473421 is a `hidden beast` number, since 1 + 234 + 7 + 3 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49702500 + 73770921 = 7050^2 + 8589^2 .

It is not a de Polignac number, because 123473421 - 2⁷ = 123473293 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123473401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 23080 + ... + 27921.

It is an arithmetic number, because the mean of its divisors is an integer number (14918085).

Almost surely, 2^123473421 is an apocalyptic number.

It is an amenable number.

123473421 is a deficient number, since it is larger than the sum of its proper divisors (55543599).

123473421 is a wasteful number, since it uses less digits than its factorization.

123473421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51276 (or 51273 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 123473421 is about 11111.8594753533. The cubic root of 123473421 is about 497.9562186314.

The spelling of 123473421 in words is "one hundred twenty-three million, four hundred seventy-three thousand, four hundred twenty-one".