42123432 has 64 divisors (see below), whose sum is σ = 114912000. Its totient is φ = 12789504.

The previous prime is 42123401. The next prime is 42123449. The reversal of 42123432 is 23432124.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 42123399 and 42123408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23794 + ... + 25502.

It is an arithmetic number, because the mean of its divisors is an integer number (1795500).

Almost surely, 2^42123432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42123432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57456000).

42123432 is an abundant number, since it is smaller than the sum of its proper divisors (72788568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42123432 is a wasteful number, since it uses less digits than its factorization.

42123432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810 (or 1806 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 42123432 is about 6490.2566975429. The cubic root of 42123432 is about 347.9428496452.

Adding to 42123432 its reverse (23432124), we get a palindrome (65555556).

The spelling of 42123432 in words is "forty-two million, one hundred twenty-three thousand, four hundred thirty-two".