42520005 has 96 divisors (see below), whose sum is σ = 88099200. Its totient is φ = 19388160.

The previous prime is 42519959. The next prime is 42520021. The reversal of 42520005 is 50002524.

It is not a de Polignac number, because 42520005 - 2⁷ = 42519877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42520005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 310297 + ... + 310433.

It is an arithmetic number, because the mean of its divisors is an integer number (917700).

Almost surely, 2^42520005 is an apocalyptic number.

42520005 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42520005 is an abundant number, since it is smaller than the sum of its proper divisors (45579195).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42520005 is a wasteful number, since it uses less digits than its factorization.

42520005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 42520005 is about 6520.7365381527. The cubic root of 42520005 is about 349.0313488697.

Adding to 42520005 its reverse (50002524), we get a palindrome (92522529).

The spelling of 42520005 in words is "forty-two million, five hundred twenty thousand, five".