2061601 has 2 divisors, whose sum is σ = 2061602. Its totient is φ = 2061600.

The previous prime is 2061599. The next prime is 2061613. The reversal of 2061601 is 1061602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2030625 + 30976 = 1425^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061601 - 2¹ = 2061599 is a prime.

Together with 2061599, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2061691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030800 + 1030801.

It is an arithmetic number, because the mean of its divisors is an integer number (1030801).

2^2061601 is an apocalyptic number.

It is an amenable number.

2061601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061601 is an equidigital number, since it uses as much as digits as its factorization.

2061601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2061601 is about 1435.8276358951. The cubic root of 2061601 is about 127.2725870592.

Subtracting from 2061601 its reverse (1061602), we obtain a palindrome (999999).

It can be divided in two parts, 2061 and 601, that added together give a palindrome (2662).

The spelling of 2061601 in words is "two million, sixty-one thousand, six hundred one".