42520023 has 48 divisors (see below), whose sum is σ = 76265280. Its totient is φ = 22228992.

The previous prime is 42520021. The next prime is 42520039. The reversal of 42520023 is 32002524.

It is not a de Polignac number, because 42520023 - 2¹ = 42520021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42519978 and 42520005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157933 + ... + 158201.

It is an arithmetic number, because the mean of its divisors is an integer number (1588860).

Almost surely, 2^42520023 is an apocalyptic number.

42520023 is a deficient number, since it is larger than the sum of its proper divisors (33745257).

42520023 is a wasteful number, since it uses less digits than its factorization.

42520023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 42520023 is about 6520.7379183648. The cubic root of 42520023 is about 349.0313981215.

Adding to 42520023 its reverse (32002524), we get a palindrome (74522547).

The spelling of 42520023 in words is "forty-two million, five hundred twenty thousand, twenty-three".