123959421 has 48 divisors (see below), whose sum is σ = 192471552. Its totient is φ = 76752000.

The previous prime is 123959419. The next prime is 123959431. The reversal of 123959421 is 124959321.

123959421 is a `hidden beast` number, since 12 + 39 + 594 + 21 = 666.

It is not a de Polignac number, because 123959421 - 2¹ = 123959419 is a prime.

It is a super-4 number, since 4×123959421⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123959431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1227271 + ... + 1227371.

It is an arithmetic number, because the mean of its divisors is an integer number (4009824).

Almost surely, 2^123959421 is an apocalyptic number.

It is an amenable number.

123959421 is a deficient number, since it is larger than the sum of its proper divisors (68512131).

123959421 is a wasteful number, since it uses less digits than its factorization.

123959421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 271 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 123959421 is about 11133.7065256814. The cubic root of 123959421 is about 498.6086934565.

The spelling of 123959421 in words is "one hundred twenty-three million, nine hundred fifty-nine thousand, four hundred twenty-one".