42242040 has 64 divisors (see below), whose sum is σ = 140810400. Its totient is φ = 11264256.

The previous prime is 42242033. The next prime is 42242047. The reversal of 42242040 is 4024224.

42242040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42242033) and next prime (42242047).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42242047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18477 + ... + 20636.

Almost surely, 2^42242040 is an apocalyptic number.

42242040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42242040 is an abundant number, since it is smaller than the sum of its proper divisors (98568360).

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

42242040 is a wasteful number, since it uses less digits than its factorization.

42242040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39133 (or 39123 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42242040 is about 6499.3876634649. The cubic root of 42242040 is about 348.2691140715.

Adding to 42242040 its reverse (4024224), we get a palindrome (46266264).

The spelling of 42242040 in words is "forty-two million, two hundred forty-two thousand, forty".