42681651 has 4 divisors (see below), whose sum is σ = 56908872. Its totient is φ = 28454432.

The previous prime is 42681647. The next prime is 42681673. The reversal of 42681651 is 15618624.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42681651 - 2² = 42681647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42681601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7113606 + ... + 7113611.

It is an arithmetic number, because the mean of its divisors is an integer number (14227218).

Almost surely, 2^42681651 is an apocalyptic number.

42681651 is a deficient number, since it is larger than the sum of its proper divisors (14227221).

42681651 is a wasteful number, since it uses less digits than its factorization.

42681651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14227220.

The product of its digits is 11520, while the sum is 33.

The square root of 42681651 is about 6533.1195458219. The cubic root of 42681651 is about 349.4730874220.

The spelling of 42681651 in words is "forty-two million, six hundred eighty-one thousand, six hundred fifty-one".