1801601 has 2 divisors, whose sum is σ = 1801602. Its totient is φ = 1801600.

The previous prime is 1801589. The next prime is 1801619. The reversal of 1801601 is 1061081.

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., 1575025 + 226576 = 1255^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801601 - 2¹⁰ = 1800577 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1801601.

It is not a weakly prime, because it can be changed into another prime (1801691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900800 + 900801.

It is an arithmetic number, because the mean of its divisors is an integer number (900801).

2^1801601 is an apocalyptic number.

It is an amenable number.

1801601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801601 is an equidigital number, since it uses as much as digits as its factorization.

1801601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1801601 is about 1342.2373113574. The cubic root of 1801601 is about 121.6800944292.

Adding to 1801601 its reverse (1061081), we get a palindrome (2862682).

The spelling of 1801601 in words is "one million, eight hundred one thousand, six hundred one".