42872961 has 4 divisors (see below), whose sum is σ = 57163952. Its totient is φ = 28581972.

The previous prime is 42872957. The next prime is 42872981. The reversal of 42872961 is 16927824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42872961 - 2² = 42872957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42872941) 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, 7145491 + ... + 7145496.

It is an arithmetic number, because the mean of its divisors is an integer number (14290988).

Almost surely, 2^42872961 is an apocalyptic number.

It is an amenable number.

42872961 is a deficient number, since it is larger than the sum of its proper divisors (14290991).

42872961 is a wasteful number, since it uses less digits than its factorization.

42872961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14290990.

The product of its digits is 48384, while the sum is 39.

The square root of 42872961 is about 6547.7447262397. The cubic root of 42872961 is about 349.9944516127.

The spelling of 42872961 in words is "forty-two million, eight hundred seventy-two thousand, nine hundred sixty-one".