123743421 has 12 divisors (see below), whose sum is σ = 179026848. Its totient is φ = 82363464.

The previous prime is 123743407. The next prime is 123743437. The reversal of 123743421 is 124347321.

It is a happy number.

123743421 is a `hidden beast` number, since 1 + 237 + 4 + 3 + 421 = 666.

It is not a de Polignac number, because 123743421 - 2⁹ = 123742909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123743401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4905 + ... + 16478.

It is an arithmetic number, because the mean of its divisors is an integer number (14918904).

Almost surely, 2^123743421 is an apocalyptic number.

It is an amenable number.

123743421 is a deficient number, since it is larger than the sum of its proper divisors (55283427).

123743421 is a wasteful number, since it uses less digits than its factorization.

123743421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032 (or 22029 counting only the distinct ones).

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

The square root of 123743421 is about 11124.0020226535. The cubic root of 123743421 is about 498.3189155781.

The spelling of 123743421 in words is "one hundred twenty-three million, seven hundred forty-three thousand, four hundred twenty-one".