42557500 has 60 divisors (see below), whose sum is σ = 96437880. Its totient is φ = 16408000.

The previous prime is 42557497. The next prime is 42557509. The reversal of 42557500 is 575524.

It is a super-2 number, since 2×42557500² = 3622281612500000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42557509) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72207 + ... + 72793.

It is an arithmetic number, because the mean of its divisors is an integer number (1607298).

Almost surely, 2^42557500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42557500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48218940).

42557500 is an abundant number, since it is smaller than the sum of its proper divisors (53880380).

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

42557500 is a wasteful number, since it uses less digits than its factorization.

42557500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 28.

The square root of 42557500 is about 6523.6109632626. The cubic root of 42557500 is about 349.1339130277.

The spelling of 42557500 in words is "forty-two million, five hundred fifty-seven thousand, five hundred".