42096639 has 16 divisors (see below), whose sum is σ = 62082272. Its totient is φ = 25204608.

The previous prime is 42096629. The next prime is 42096643. The reversal of 42096639 is 93669024.

It is a happy number.

It is not a de Polignac number, because 42096639 - 2⁴ = 42096623 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42096597 and 42096606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42096619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13144 + ... + 16029.

It is an arithmetic number, because the mean of its divisors is an integer number (3880142).

Almost surely, 2^42096639 is an apocalyptic number.

42096639 is a deficient number, since it is larger than the sum of its proper divisors (19985633).

42096639 is a wasteful number, since it uses less digits than its factorization.

42096639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29226.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 42096639 is about 6488.1922752027. The cubic root of 42096639 is about 347.8690632389.

The spelling of 42096639 in words is "forty-two million, ninety-six thousand, six hundred thirty-nine".