42423012 has 18 divisors (see below), whose sum is σ = 107236038. Its totient is φ = 14140992.

The previous prime is 42423011. The next prime is 42423049. The reversal of 42423012 is 21032424.

42423012 is a `hidden beast` number, since 424 + 230 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29419776 + 13003236 = 5424^2 + 3606^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42423011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589173 + ... + 589244.

Almost surely, 2^42423012 is an apocalyptic number.

It is an amenable number.

42423012 is an abundant number, since it is smaller than the sum of its proper divisors (64813026).

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

42423012 is a wasteful number, since it uses less digits than its factorization.

42423012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178427 (or 1178422 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42423012 is about 6513.2950186522. The cubic root of 42423012 is about 348.7657533255.

Adding to 42423012 its reverse (21032424), we get a palindrome (63455436).

It can be divided in two parts, 424 and 23012, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 42423012 in words is "forty-two million, four hundred twenty-three thousand, twelve".