42685877 has 4 divisors (see below), whose sum is σ = 45969420. Its totient is φ = 39402336.

The previous prime is 42685873. The next prime is 42685889. The reversal of 42685877 is 77858624.

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 23902321 + 18783556 = 4889^2 + 4334^2 .

It is a cyclic number.

It is not a de Polignac number, because 42685877 - 2² = 42685873 is a prime.

It is a super-3 number, since 3×42685877³ (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 (42685871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641752 + ... + 1641777.

It is an arithmetic number, because the mean of its divisors is an integer number (11492355).

Almost surely, 2^42685877 is an apocalyptic number.

It is an amenable number.

42685877 is a deficient number, since it is larger than the sum of its proper divisors (3283543).

42685877 is a wasteful number, since it uses less digits than its factorization.

42685877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283542.

The product of its digits is 752640, while the sum is 47.

The square root of 42685877 is about 6533.4429667672. The cubic root of 42685877 is about 349.4846210631.

The spelling of 42685877 in words is "forty-two million, six hundred eighty-five thousand, eight hundred seventy-seven".