7581601 has 2 divisors, whose sum is σ = 7581602. Its totient is φ = 7581600.

The previous prime is 7581599. The next prime is 7581611. The reversal of 7581601 is 1061857.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5688225 + 1893376 = 2385^2 + 1376^2 .

It is a cyclic number.

It is not a de Polignac number, because 7581601 - 2¹ = 7581599 is a prime.

Together with 7581599, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7581601.

It is not a weakly prime, because it can be changed into another prime (7581611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3790800 + 3790801.

It is an arithmetic number, because the mean of its divisors is an integer number (3790801).

Almost surely, 2^7581601 is an apocalyptic number.

It is an amenable number.

7581601 is a deficient number, since it is larger than the sum of its proper divisors (1).

7581601 is an equidigital number, since it uses as much as digits as its factorization.

7581601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 7581601 is about 2753.4707189291. The cubic root of 7581601 is about 196.4507275882.

The spelling of 7581601 in words is "seven million, five hundred eighty-one thousand, six hundred one".