42040252 has 36 divisors (see below), whose sum is σ = 80149104. Its totient is φ = 19279360.

The previous prime is 42040249. The next prime is 42040253. The reversal of 42040252 is 25204024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46953 + ... + 47839.

It is an arithmetic number, because the mean of its divisors is an integer number (2226364).

Almost surely, 2^42040252 is an apocalyptic number.

It is an amenable number.

42040252 is a deficient number, since it is larger than the sum of its proper divisors (38108852).

42040252 is a wasteful number, since it uses less digits than its factorization.

42040252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42040252 is about 6483.8454639203. The cubic root of 42040252 is about 347.7136742905.

Adding to 42040252 its reverse (25204024), we get a palindrome (67244276).

The spelling of 42040252 in words is "forty-two million, forty thousand, two hundred fifty-two".