701581 has 2 divisors, whose sum is σ = 701582. Its totient is φ = 701580.

The previous prime is 701579. The next prime is 701593. The reversal of 701581 is 185107.

701581 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., 697225 + 4356 = 835^2 + 66^2 .

It is a cyclic number.

It is not a de Polignac number, because 701581 - 2¹ = 701579 is a prime.

It is a super-2 number, since 2×701581² = 984431799122, which contains 22 as substring.

Together with 701579, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (701531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 350790 + 350791.

It is an arithmetic number, because the mean of its divisors is an integer number (350791).

2⁷⁰¹⁵⁸¹ is an apocalyptic number.

It is an amenable number.

701581 is a deficient number, since it is larger than the sum of its proper divisors (1).

701581 is an equidigital number, since it uses as much as digits as its factorization.

701581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 701581 is about 837.6043218609. The cubic root of 701581 is about 88.8571963984.

Adding to 701581 its reverse (185107), we get a palindrome (886688).

The spelling of 701581 in words is "seven hundred one thousand, five hundred eighty-one".