42642511 has 4 divisors (see below), whose sum is σ = 45150912. Its totient is φ = 40134112.

The previous prime is 42642497. The next prime is 42642521. The reversal of 42642511 is 11524624.

It is a happy number.

42642511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42642511 - 2¹⁷ = 42511439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42642521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254175 + ... + 1254208.

It is an arithmetic number, because the mean of its divisors is an integer number (11287728).

Almost surely, 2^42642511 is an apocalyptic number.

42642511 is a deficient number, since it is larger than the sum of its proper divisors (2508401).

42642511 is a wasteful number, since it uses less digits than its factorization.

42642511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508400.

The product of its digits is 1920, while the sum is 25.

The square root of 42642511 is about 6530.1233525868. The cubic root of 42642511 is about 349.3662299506.

The spelling of 42642511 in words is "forty-two million, six hundred forty-two thousand, five hundred eleven".