42687485 has 4 divisors (see below), whose sum is σ = 51224988. Its totient is φ = 34149984.

The previous prime is 42687479. The next prime is 42687487. The reversal of 42687485 is 58478624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14830201 + 27857284 = 3851^2 + 5278^2 .

It is a cyclic number.

It is not a de Polignac number, because 42687485 - 2¹⁶ = 42621949 is a prime.

It is a super-3 number, since 3×42687485³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42687487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4268744 + ... + 4268753.

It is an arithmetic number, because the mean of its divisors is an integer number (12806247).

Almost surely, 2^42687485 is an apocalyptic number.

It is an amenable number.

42687485 is a deficient number, since it is larger than the sum of its proper divisors (8537503).

42687485 is an equidigital number, since it uses as much as digits as its factorization.

42687485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8537502.

The product of its digits is 430080, while the sum is 44.

The square root of 42687485 is about 6533.5660247678. The cubic root of 42687485 is about 349.4890094326.

The spelling of 42687485 in words is "forty-two million, six hundred eighty-seven thousand, four hundred eighty-five".