42391572 has 12 divisors (see below), whose sum is σ = 98913696. Its totient is φ = 14130520.

The previous prime is 42391571. The next prime is 42391579. The reversal of 42391572 is 27519324.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42391571) 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, 1766304 + ... + 1766327.

It is an arithmetic number, because the mean of its divisors is an integer number (8242808).

Almost surely, 2^42391572 is an apocalyptic number.

It is an amenable number.

42391572 is an abundant number, since it is smaller than the sum of its proper divisors (56522124).

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

42391572 is a wasteful number, since it uses less digits than its factorization.

42391572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3532638 (or 3532636 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 42391572 is about 6510.8810463715. The cubic root of 42391572 is about 348.6795744281.

The spelling of 42391572 in words is "forty-two million, three hundred ninety-one thousand, five hundred seventy-two".