42009570 has 96 divisors (see below), whose sum is σ = 118506240. Its totient is φ = 10588320.

The previous prime is 42009509. The next prime is 42009571. The reversal of 42009570 is 7590024.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42009571) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97255 + ... + 97685.

It is an arithmetic number, because the mean of its divisors is an integer number (1234440).

Almost surely, 2^42009570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42009570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59253120).

42009570 is an abundant number, since it is smaller than the sum of its proper divisors (76496670).

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

42009570 is a wasteful number, since it uses less digits than its factorization.

42009570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 42009570 is about 6481.4789978831. The cubic root of 42009570 is about 347.6290637337.

Adding to 42009570 its reverse (7590024), we get a palindrome (49599594).

The spelling of 42009570 in words is "forty-two million, nine thousand, five hundred seventy".