42515413 has 4 divisors (see below), whose sum is σ = 42928288. Its totient is φ = 42102540.

The previous prime is 42515411. The next prime is 42515437. The reversal of 42515413 is 31451524.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42515413 - 2¹ = 42515411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206283 + ... + 206488.

It is an arithmetic number, because the mean of its divisors is an integer number (10732072).

Almost surely, 2^42515413 is an apocalyptic number.

It is an amenable number.

42515413 is a deficient number, since it is larger than the sum of its proper divisors (412875).

42515413 is a wasteful number, since it uses less digits than its factorization.

42515413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412874.

The product of its digits is 2400, while the sum is 25.

The square root of 42515413 is about 6520.3844211825. The cubic root of 42515413 is about 349.0187837281.

Adding to 42515413 its reverse (31451524), we get a palindrome (73966937).

The spelling of 42515413 in words is "forty-two million, five hundred fifteen thousand, four hundred thirteen".