42521946 has 16 divisors (see below), whose sum is σ = 87976800. Its totient is φ = 13685168.

The previous prime is 42521933. The next prime is 42521951. The reversal of 42521946 is 64912524.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122016 + ... + 122363.

It is an arithmetic number, because the mean of its divisors is an integer number (5498550).

Almost surely, 2^42521946 is an apocalyptic number.

42521946 is an abundant number, since it is smaller than the sum of its proper divisors (45454854).

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

42521946 is a wasteful number, since it uses less digits than its factorization.

42521946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244413.

The product of its digits is 17280, while the sum is 33.

The square root of 42521946 is about 6520.8853693344. The cubic root of 42521946 is about 349.0366597780.

The spelling of 42521946 in words is "forty-two million, five hundred twenty-one thousand, nine hundred forty-six".