42240012 has 24 divisors (see below), whose sum is σ = 98834736. Its totient is φ = 14040768.

The previous prime is 42239971. The next prime is 42240013. The reversal of 42240012 is 21004224.

It is a super-2 number, since 2×42240012² = 3568437227520288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42239973 and 42240000.

It is not an unprimeable number, because it can be changed into a prime (42240013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243 + ... + 9194.

It is an arithmetic number, because the mean of its divisors is an integer number (4118114).

Almost surely, 2^42240012 is an apocalyptic number.

It is an amenable number.

42240012 is an abundant number, since it is smaller than the sum of its proper divisors (56594724).

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

42240012 is a wasteful number, since it uses less digits than its factorization.

42240012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9817 (or 9815 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 42240012 is about 6499.2316468949. The cubic root of 42240012 is about 348.2635406264.

Adding to 42240012 its reverse (21004224), we get a palindrome (63244236).

The spelling of 42240012 in words is "forty-two million, two hundred forty thousand, twelve".