42261911 has 4 divisors (see below), whose sum is σ = 42373800. Its totient is φ = 42150024.

The previous prime is 42261899. The next prime is 42261929. The reversal of 42261911 is 11916224.

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 42261911 - 2¹⁰ = 42260887 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 (42261931) 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, 55376 + ... + 56133.

It is an arithmetic number, because the mean of its divisors is an integer number (10593450).

Almost surely, 2^42261911 is an apocalyptic number.

42261911 is a deficient number, since it is larger than the sum of its proper divisors (111889).

42261911 is a wasteful number, since it uses less digits than its factorization.

42261911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111888.

The product of its digits is 864, while the sum is 26.

The square root of 42261911 is about 6500.9161662030. The cubic root of 42261911 is about 348.3237150543.

The spelling of 42261911 in words is "forty-two million, two hundred sixty-one thousand, nine hundred eleven".