42668137 has 8 divisors (see below), whose sum is σ = 43389440. Its totient is φ = 41951520.

The previous prime is 42668123. The next prime is 42668149. The reversal of 42668137 is 73186624.

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

It is a cyclic number.

It is not a de Polignac number, because 42668137 - 2²³ = 34279529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42668096 and 42668105.

It is not an unprimeable number, because it can be changed into a prime (42668117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20413 + ... + 22405.

It is an arithmetic number, because the mean of its divisors is an integer number (5423680).

Almost surely, 2^42668137 is an apocalyptic number.

It is an amenable number.

42668137 is a deficient number, since it is larger than the sum of its proper divisors (721303).

42668137 is a wasteful number, since it uses less digits than its factorization.

42668137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343.

The product of its digits is 48384, while the sum is 37.

The square root of 42668137 is about 6532.0851954028. The cubic root of 42668137 is about 349.4361997687.

It can be divided in two parts, 4266 and 8137, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 42668137 in words is "forty-two million, six hundred sixty-eight thousand, one hundred thirty-seven".