42521712 has 20 divisors (see below), whose sum is σ = 109847880. Its totient is φ = 14173888.

The previous prime is 42521657. The next prime is 42521719. The reversal of 42521712 is 21712524.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442887 + ... + 442982.

It is an arithmetic number, because the mean of its divisors is an integer number (5492394).

Almost surely, 2^42521712 is an apocalyptic number.

It is an amenable number.

42521712 is an abundant number, since it is smaller than the sum of its proper divisors (67326168).

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

42521712 is a wasteful number, since it uses less digits than its factorization.

42521712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885880 (or 885874 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 42521712 is about 6520.8674269609. The cubic root of 42521712 is about 349.0360195225.

The spelling of 42521712 in words is "forty-two million, five hundred twenty-one thousand, seven hundred twelve".