42491966 has 8 divisors (see below), whose sum is σ = 69532344. Its totient is φ = 19314520.

The previous prime is 42491927. The next prime is 42492019. The reversal of 42491966 is 66919424.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965705 + ... + 965748.

It is an arithmetic number, because the mean of its divisors is an integer number (8691543).

Almost surely, 2^42491966 is an apocalyptic number.

42491966 is a deficient number, since it is larger than the sum of its proper divisors (27040378).

42491966 is a wasteful number, since it uses less digits than its factorization.

42491966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931466.

The product of its digits is 93312, while the sum is 41.

The square root of 42491966 is about 6518.5861964079. The cubic root of 42491966 is about 348.9546113281.

The spelling of 42491966 in words is "forty-two million, four hundred ninety-one thousand, nine hundred sixty-six".