42520265 has 4 divisors (see below), whose sum is σ = 51024324. Its totient is φ = 34016208.

The previous prime is 42520259. The next prime is 42520273. The reversal of 42520265 is 56202524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21799561 + 20720704 = 4669^2 + 4552^2 .

It is a cyclic number.

It is not a de Polignac number, because 42520265 - 2¹⁰ = 42519241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4252022 + ... + 4252031.

It is an arithmetic number, because the mean of its divisors is an integer number (12756081).

Almost surely, 2^42520265 is an apocalyptic number.

It is an amenable number.

42520265 is a deficient number, since it is larger than the sum of its proper divisors (8504059).

42520265 is an equidigital number, since it uses as much as digits as its factorization.

42520265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504058.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 42520265 is about 6520.7564745204. The cubic root of 42520265 is about 349.0320602836.

Adding to 42520265 its reverse (56202524), we get a palindrome (98722789).

The spelling of 42520265 in words is "forty-two million, five hundred twenty thousand, two hundred sixty-five".