42555040 has 48 divisors (see below), whose sum is σ = 109680480. Its totient is φ = 15473920.

The previous prime is 42555011. The next prime is 42555043. The reversal of 42555040 is 4055524.

It is a junction number, because it is equal to n+sod(n) for n = 42554996 and 42555014.

It is not an unprimeable number, because it can be changed into a prime (42555043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10330 + ... + 13849.

It is an arithmetic number, because the mean of its divisors is an integer number (2285010).

Almost surely, 2^42555040 is an apocalyptic number.

42555040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42555040 is an abundant number, since it is smaller than the sum of its proper divisors (67125440).

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

42555040 is a wasteful number, since it uses less digits than its factorization.

42555040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24205 (or 24197 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 42555040 is about 6523.4224146532. The cubic root of 42555040 is about 349.1271857687.

The spelling of 42555040 in words is "forty-two million, five hundred fifty-five thousand, forty".