42942511 has 4 divisors (see below), whose sum is σ = 43583512. Its totient is φ = 42301512.

The previous prime is 42942481. The next prime is 42942517. The reversal of 42942511 is 11524924.

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 42942511 - 2⁹ = 42941999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42942511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42942517) 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, 320400 + ... + 320533.

It is an arithmetic number, because the mean of its divisors is an integer number (10895878).

Almost surely, 2^42942511 is an apocalyptic number.

42942511 is a deficient number, since it is larger than the sum of its proper divisors (641001).

42942511 is an equidigital number, since it uses as much as digits as its factorization.

42942511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641000.

The product of its digits is 2880, while the sum is 28.

The square root of 42942511 is about 6553.0535630346. The cubic root of 42942511 is about 350.1836070658.

The spelling of 42942511 in words is "forty-two million, nine hundred forty-two thousand, five hundred eleven".