42642653 has 4 divisors (see below), whose sum is σ = 43033980. Its totient is φ = 42251328.

The previous prime is 42642637. The next prime is 42642679. The reversal of 42642653 is 35624624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21362884 + 21279769 = 4622^2 + 4613^2 .

It is a cyclic number.

It is not a de Polignac number, because 42642653 - 2⁴ = 42642637 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42642623) 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, 195500 + ... + 195717.

It is an arithmetic number, because the mean of its divisors is an integer number (10758495).

Almost surely, 2^42642653 is an apocalyptic number.

It is an amenable number.

42642653 is a deficient number, since it is larger than the sum of its proper divisors (391327).

42642653 is a wasteful number, since it uses less digits than its factorization.

42642653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391326.

The product of its digits is 34560, while the sum is 32.

The square root of 42642653 is about 6530.1342252667. The cubic root of 42642653 is about 349.3666177479.

The spelling of 42642653 in words is "forty-two million, six hundred forty-two thousand, six hundred fifty-three".