545657 has 4 divisors (see below), whose sum is σ = 623616. Its totient is φ = 467700.

The previous prime is 545651. The next prime is 545663. The reversal of 545657 is 756545.

It is a happy number.

545657 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (545651) and next prime (545663).

It is a cyclic number.

It is not a de Polignac number, because 545657 - 2⁴ = 545641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (545651) 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, 38969 + ... + 38982.

It is an arithmetic number, because the mean of its divisors is an integer number (155904).

2⁵⁴⁵⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

545657 is a deficient number, since it is larger than the sum of its proper divisors (77959).

545657 is an equidigital number, since it uses as much as digits as its factorization.

545657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77958.

The product of its digits is 21000, while the sum is 32.

The square root of 545657 is about 738.6859955353. The cubic root of 545657 is about 81.7159016363.

The spelling of 545657 in words is "five hundred forty-five thousand, six hundred fifty-seven".