42502505 has 12 divisors (see below), whose sum is σ = 53320260. Its totient is φ = 32521632.

The previous prime is 42502501. The next prime is 42502511. The reversal of 42502505 is 50520524.

It can be written as a sum of positive squares in 2 ways, for example, as 13039321 + 29463184 = 3611^2 + 5428^2 .

It is not a de Polignac number, because 42502505 - 2² = 42502501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (42502501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5390 + ... + 10679.

It is an arithmetic number, because the mean of its divisors is an integer number (4443355).

Almost surely, 2^42502505 is an apocalyptic number.

It is an amenable number.

42502505 is a deficient number, since it is larger than the sum of its proper divisors (10817755).

42502505 is a wasteful number, since it uses less digits than its factorization.

42502505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16120 (or 16097 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 42502505 is about 6519.3945271014. The cubic root of 42502505 is about 348.9834585746.

The spelling of 42502505 in words is "forty-two million, five hundred two thousand, five hundred five".