42515946 has 72 divisors (see below), whose sum is σ = 106894944. Its totient is φ = 12109440.

The previous prime is 42515933. The next prime is 42515947. The reversal of 42515946 is 64951524.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42515946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515947) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 56851 + ... + 57593.

It is an arithmetic number, because the mean of its divisors is an integer number (1484652).

Almost surely, 2^42515946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42515946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53447472).

42515946 is an abundant number, since it is smaller than the sum of its proper divisors (64378998).

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

42515946 is a wasteful number, since it uses less digits than its factorization.

42515946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 776 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 42515946 is about 6520.4252928778. The cubic root of 42515946 is about 349.0202422284.

The spelling of 42515946 in words is "forty-two million, five hundred fifteen thousand, nine hundred forty-six".