42691500 has 144 divisors (see below), whose sum is σ = 137985120. Its totient is φ = 11107200.

The previous prime is 42691489. The next prime is 42691507. The reversal of 42691500 is 519624.

It is not an unprimeable number, because it can be changed into a prime (42691507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 238411 + ... + 238589.

It is an arithmetic number, because the mean of its divisors is an integer number (958230).

Almost surely, 2^42691500 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 42691500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68992560).

42691500 is an abundant number, since it is smaller than the sum of its proper divisors (95293620).

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

42691500 is a wasteful number, since it uses less digits than its factorization.

42691500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 42691500 is about 6533.8732770081. The cubic root of 42691500 is about 349.4999662301.

The spelling of 42691500 in words is "forty-two million, six hundred ninety-one thousand, five hundred".