42520465 has 8 divisors (see below), whose sum is σ = 54949608. Its totient is φ = 31399680.

The previous prime is 42520447. The next prime is 42520487. The reversal of 42520465 is 56402524.

It can be written as a sum of positive squares in 4 ways, for example, as 5602689 + 36917776 = 2367^2 + 6076^2 .

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

It is not a de Polignac number, because 42520465 - 2⁵ = 42520433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327016 + ... + 327145.

It is an arithmetic number, because the mean of its divisors is an integer number (6868701).

Almost surely, 2^42520465 is an apocalyptic number.

It is an amenable number.

42520465 is a deficient number, since it is larger than the sum of its proper divisors (12429143).

42520465 is a wasteful number, since it uses less digits than its factorization.

42520465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654179.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 42520465 is about 6520.7718101464. The cubic root of 42520465 is about 349.0326075230.

Adding to 42520465 its reverse (56402524), we get a palindrome (98922989).

The spelling of 42520465 in words is "forty-two million, five hundred twenty thousand, four hundred sixty-five".