42521205 has 8 divisors (see below), whose sum is σ = 68033952. Its totient is φ = 22677968.

The previous prime is 42521203. The next prime is 42521231. The reversal of 42521205 is 50212524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42521205 - 2¹ = 42521203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521203) 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, 1417359 + ... + 1417388.

It is an arithmetic number, because the mean of its divisors is an integer number (8504244).

Almost surely, 2^42521205 is an apocalyptic number.

It is an amenable number.

42521205 is a deficient number, since it is larger than the sum of its proper divisors (25512747).

42521205 is a wasteful number, since it uses less digits than its factorization.

42521205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834755.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 42521205 is about 6520.8285516489. The cubic root of 42521205 is about 349.0346322942.

Adding to 42521205 its reverse (50212524), we get a palindrome (92733729).

The spelling of 42521205 in words is "forty-two million, five hundred twenty-one thousand, two hundred five".