42572720 has 20 divisors (see below), whose sum is σ = 98981760. Its totient is φ = 17029056.

The previous prime is 42572687. The next prime is 42572729. The reversal of 42572720 is 2727524.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (42572729) 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, 266000 + ... + 266159.

It is an arithmetic number, because the mean of its divisors is an integer number (4949088).

Almost surely, 2^42572720 is an apocalyptic number.

42572720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42572720 is an abundant number, since it is smaller than the sum of its proper divisors (56409040).

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

42572720 is a wasteful number, since it uses less digits than its factorization.

42572720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532172 (or 532166 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 42572720 is about 6524.7773908387. Note that the first 3 decimals coincide. The cubic root of 42572720 is about 349.1755287618.

The spelling of 42572720 in words is "forty-two million, five hundred seventy-two thousand, seven hundred twenty".