42651943 has 4 divisors (see below), whose sum is σ = 42670080. Its totient is φ = 42633808.

The previous prime is 42651911. The next prime is 42651949. The reversal of 42651943 is 34915624.

It is a happy number.

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 42651943 - 2⁵ = 42651911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42651899 and 42651908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42651949) 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, 4903 + ... + 10456.

It is an arithmetic number, because the mean of its divisors is an integer number (10667520).

Almost surely, 2^42651943 is an apocalyptic number.

42651943 is a deficient number, since it is larger than the sum of its proper divisors (18137).

42651943 is a wasteful number, since it uses less digits than its factorization.

42651943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18136.

The product of its digits is 25920, while the sum is 34.

The square root of 42651943 is about 6530.8455042207. The cubic root of 42651943 is about 349.3919865589.

The spelling of 42651943 in words is "forty-two million, six hundred fifty-one thousand, nine hundred forty-three".