42372505 has 32 divisors (see below), whose sum is σ = 61286400. Its totient is φ = 28082880.

The previous prime is 42372503. The next prime is 42372523. The reversal of 42372505 is 50527324.

It is not a de Polignac number, because 42372505 - 2¹ = 42372503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42372503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52767 + ... + 53563.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 2^42372505 is an apocalyptic number.

It is an amenable number.

42372505 is a deficient number, since it is larger than the sum of its proper divisors (18913895).

42372505 is an equidigital number, since it uses as much as digits as its factorization.

42372505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 42372505 is about 6509.4166405293. The cubic root of 42372505 is about 348.6272898965.

Adding to 42372505 its reverse (50527324), we get a palindrome (92899829).

The spelling of 42372505 in words is "forty-two million, three hundred seventy-two thousand, five hundred five".