42991276 has 12 divisors (see below), whose sum is σ = 76835808. Its totient is φ = 21038192.

The previous prime is 42991259. The next prime is 42991279. The reversal of 42991276 is 67219924.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (42991279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114151 + ... + 114526.

It is an arithmetic number, because the mean of its divisors is an integer number (6402984).

Almost surely, 2^42991276 is an apocalyptic number.

It is an amenable number.

42991276 is a deficient number, since it is larger than the sum of its proper divisors (33844532).

42991276 is a wasteful number, since it uses less digits than its factorization.

42991276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228728 (or 228726 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 42991276 is about 6556.7732917953. The cubic root of 42991276 is about 350.3161116884.

The spelling of 42991276 in words is "forty-two million, nine hundred ninety-one thousand, two hundred seventy-six".