42561911 has 8 divisors (see below), whose sum is σ = 48775584. Its totient is φ = 36381600.

The previous prime is 42561907. The next prime is 42561923. The reversal of 42561911 is 11916524.

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

It is a cyclic number.

It is not a de Polignac number, because 42561911 - 2² = 42561907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42561901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5540 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (6096948).

Almost surely, 2^42561911 is an apocalyptic number.

42561911 is a deficient number, since it is larger than the sum of its proper divisors (6213673).

42561911 is a wasteful number, since it uses less digits than its factorization.

42561911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16681.

The product of its digits is 2160, while the sum is 29.

The square root of 42561911 is about 6523.9490341357. The cubic root of 42561911 is about 349.1459749556.

The spelling of 42561911 in words is "forty-two million, five hundred sixty-one thousand, nine hundred eleven".