1901601 has 12 divisors (see below), whose sum is σ = 2958228. Its totient is φ = 1170144.

The previous prime is 1901597. The next prime is 1901639. The reversal of 1901601 is 1061091.

It can be written as a sum of positive squares in 2 ways, for example, as 767376 + 1134225 = 876^2 + 1065^2 .

It is not a de Polignac number, because 1901601 - 2² = 1901597 is a prime.

It is a super-3 number, since 3×1901601³ = 20629060333048154403, which contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1901651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8010 + ... + 8243.

It is an arithmetic number, because the mean of its divisors is an integer number (246519).

2^1901601 is an apocalyptic number.

It is an amenable number.

1901601 is a deficient number, since it is larger than the sum of its proper divisors (1056627).

1901601 is a wasteful number, since it uses less digits than its factorization.

1901601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16272 (or 16269 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1901601 is about 1378.9854966605. The cubic root of 1901601 is about 123.8910115874.

Adding to 1901601 its reverse (1061091), we get a palindrome (2962692).

The spelling of 1901601 in words is "one million, nine hundred one thousand, six hundred one".