42690642 has 8 divisors (see below), whose sum is σ = 85381296. Its totient is φ = 14230212.

The previous prime is 42690631. The next prime is 42690643. The reversal of 42690642 is 24609624.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

42690642 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (42690643) 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 3 ways as a sum of consecutive naturals, for example, 3557548 + ... + 3557559.

It is an arithmetic number, because the mean of its divisors is an integer number (10672662).

Almost surely, 2^42690642 is an apocalyptic number.

42690642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42690642 is a wasteful number, since it uses less digits than its factorization.

42690642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115112.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 42690642 is about 6533.8076188391. The cubic root of 42690642 is about 349.4976248352.

The spelling of 42690642 in words is "forty-two million, six hundred ninety thousand, six hundred forty-two".