42521342 has 16 divisors (see below), whose sum is σ = 66794112. Its totient is φ = 20263320.

The previous prime is 42521341. The next prime is 42521357. The reversal of 42521342 is 24312524.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12617 + ... + 15627.

It is an arithmetic number, because the mean of its divisors is an integer number (4174632).

Almost surely, 2^42521342 is an apocalyptic number.

42521342 is a deficient number, since it is larger than the sum of its proper divisors (24272770).

42521342 is a wasteful number, since it uses less digits than its factorization.

42521342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3343.

The product of its digits is 1920, while the sum is 23.

The square root of 42521342 is about 6520.8390564405. The cubic root of 42521342 is about 349.0350071479.

Adding to 42521342 its reverse (24312524), we get a palindrome (66833866).

The spelling of 42521342 in words is "forty-two million, five hundred twenty-one thousand, three hundred forty-two".