42521415 has 16 divisors (see below), whose sum is σ = 68177376. Its totient is φ = 22630400.

The previous prime is 42521389. The next prime is 42521419. The reversal of 42521415 is 51412524.

It is not a de Polignac number, because 42521415 - 2⁵ = 42521383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42521419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 10535.

It is an arithmetic number, because the mean of its divisors is an integer number (4261086).

Almost surely, 2^42521415 is an apocalyptic number.

42521415 is a deficient number, since it is larger than the sum of its proper divisors (25655961).

42521415 is a wasteful number, since it uses less digits than its factorization.

42521415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970.

The product of its digits is 1600, while the sum is 24.

The square root of 42521415 is about 6520.8446538773. The cubic root of 42521415 is about 349.0352068871.

Adding to 42521415 its reverse (51412524), we get a palindrome (93933939).

The spelling of 42521415 in words is "forty-two million, five hundred twenty-one thousand, four hundred fifteen".