42640485 has 16 divisors (see below), whose sum is σ = 68610240. Its totient is φ = 22613120.

The previous prime is 42640441. The next prime is 42640489. The reversal of 42640485 is 58404624.

It is not a de Polignac number, because 42640485 - 2¹⁰ = 42639461 is a prime.

It is a super-2 number, since 2×42640485² = 3636421922070450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42640489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256 + ... + 10625.

It is an arithmetic number, because the mean of its divisors is an integer number (4288140).

Almost surely, 2^42640485 is an apocalyptic number.

It is an amenable number.

42640485 is a deficient number, since it is larger than the sum of its proper divisors (25969755).

42640485 is a wasteful number, since it uses less digits than its factorization.

42640485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16068.

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 42640485 is about 6529.9682235061. The cubic root of 42640485 is about 349.3606969182.

The spelling of 42640485 in words is "forty-two million, six hundred forty thousand, four hundred eighty-five".