801557 has 2 divisors, whose sum is σ = 801558. Its totient is φ = 801556.

The previous prime is 801551. The next prime is 801569. The reversal of 801557 is 755108.

801557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 11236 = 889^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 801557 - 2⁸ = 801301 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (801551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400778 + 400779.

It is an arithmetic number, because the mean of its divisors is an integer number (400779).

2⁸⁰¹⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

801557 is a deficient number, since it is larger than the sum of its proper divisors (1).

801557 is an equidigital number, since it uses as much as digits as its factorization.

801557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 801557 is about 895.2971573729. The cubic root of 801557 is about 92.8919622588.

The spelling of 801557 in words is "eight hundred one thousand, five hundred fifty-seven".