42136664 has 8 divisors (see below), whose sum is σ = 79006260. Its totient is φ = 21068328.

The previous prime is 42136663. The next prime is 42136697. The reversal of 42136664 is 46663124.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 42136664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42136663) 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 as a sum of consecutive naturals, namely, 2633534 + ... + 2633549.

Almost surely, 2^42136664 is an apocalyptic number.

It is an amenable number.

42136664 is a deficient number, since it is larger than the sum of its proper divisors (36869596).

42136664 is a wasteful number, since it uses less digits than its factorization.

42136664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5267089 (or 5267085 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 42136664 is about 6491.2759916676. The cubic root of 42136664 is about 347.9792782835.

Adding to 42136664 its reverse (46663124), we get a palindrome (88799788).

The spelling of 42136664 in words is "forty-two million, one hundred thirty-six thousand, six hundred sixty-four".