657061 has 2 divisors, whose sum is σ = 657062. Its totient is φ = 657060.

The previous prime is 657049. The next prime is 657071. The reversal of 657061 is 160756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 961 = 810^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 657061 - 2⁵ = 657029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (657071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328530 + 328531.

It is an arithmetic number, because the mean of its divisors is an integer number (328531).

2⁶⁵⁷⁰⁶¹ is an apocalyptic number.

It is an amenable number.

657061 is a deficient number, since it is larger than the sum of its proper divisors (1).

657061 is an equidigital number, since it uses as much as digits as its factorization.

657061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 657061 is about 810.5929928145. The cubic root of 657061 is about 86.9364489429.

The spelling of 657061 in words is "six hundred fifty-seven thousand, sixty-one".