657261141 has 4 divisors (see below), whose sum is σ = 876348192. Its totient is φ = 438174092.

The previous prime is 657261139. The next prime is 657261169. The reversal of 657261141 is 141162756.

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 657261141 - 2¹ = 657261139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657261131) 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, 109543521 + ... + 109543526.

It is an arithmetic number, because the mean of its divisors is an integer number (219087048).

Almost surely, 2^657261141 is an apocalyptic number.

It is an amenable number.

657261141 is a deficient number, since it is larger than the sum of its proper divisors (219087051).

657261141 is a wasteful number, since it uses less digits than its factorization.

657261141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219087050.

The product of its digits is 10080, while the sum is 33.

The square root of 657261141 is about 25637.1047702349. The cubic root of 657261141 is about 869.4527500394.

The spelling of 657261141 in words is "six hundred fifty-seven million, two hundred sixty-one thousand, one hundred forty-one".