657442141 has 4 divisors (see below), whose sum is σ = 678649984. Its totient is φ = 636234300.

The previous prime is 657442129. The next prime is 657442169. The reversal of 657442141 is 141244756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 657442141 - 2⁵ = 657442109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657442097 and 657442106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657442171) 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, 10603875 + ... + 10603936.

It is an arithmetic number, because the mean of its divisors is an integer number (169662496).

Almost surely, 2^657442141 is an apocalyptic number.

It is an amenable number.

657442141 is a deficient number, since it is larger than the sum of its proper divisors (21207843).

657442141 is a wasteful number, since it uses less digits than its factorization.

657442141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21207842.

The product of its digits is 26880, while the sum is 34.

The square root of 657442141 is about 25640.6345670305. The cubic root of 657442141 is about 869.5325541915.

Adding to 657442141 its reverse (141244756), we get a palindrome (798686897).

The spelling of 657442141 in words is "six hundred fifty-seven million, four hundred forty-two thousand, one hundred forty-one".