42100642 has 8 divisors (see below), whose sum is σ = 63209196. Its totient is φ = 21030912.

The previous prime is 42100631. The next prime is 42100661. The reversal of 42100642 is 24600124.

It can be written as a sum of positive squares in 2 ways, for example, as 41977441 + 123201 = 6479^2 + 351^2 .

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

It is an unprimeable number.

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, 6823 + ... + 11434.

Almost surely, 2^42100642 is an apocalyptic number.

42100642 is a deficient number, since it is larger than the sum of its proper divisors (21108554).

42100642 is a wasteful number, since it uses less digits than its factorization.

42100642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19412.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42100642 is about 6488.5007513292. The cubic root of 42100642 is about 347.8800892634.

Adding to 42100642 its reverse (24600124), we get a palindrome (66700766).

The spelling of 42100642 in words is "forty-two million, one hundred thousand, six hundred forty-two".