42245040 has 40 divisors (see below), whose sum is σ = 130960368. Its totient is φ = 11265280.

The previous prime is 42245039. The next prime is 42245059. The reversal of 42245040 is 4054224.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 42244998 and 42245016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87771 + ... + 88250.

Almost surely, 2^42245040 is an apocalyptic number.

42245040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42245040 is an abundant number, since it is smaller than the sum of its proper divisors (88715328).

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

42245040 is a wasteful number, since it uses less digits than its factorization.

42245040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176037 (or 176031 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42245040 is about 6499.6184503400. The cubic root of 42245040 is about 348.2773584856.

Adding to 42245040 its reverse (4054224), we get a palindrome (46299264).

The spelling of 42245040 in words is "forty-two million, two hundred forty-five thousand, forty".