2051801 has 2 divisors, whose sum is σ = 2051802. Its totient is φ = 2051800.

The previous prime is 2051773. The next prime is 2051821. The reversal of 2051801 is 1081502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2027776 + 24025 = 1424^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051801 - 2¹⁰ = 2050777 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 2051801.

It is not a weakly prime, because it can be changed into another prime (2051821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025900 + 1025901.

It is an arithmetic number, because the mean of its divisors is an integer number (1025901).

2^2051801 is an apocalyptic number.

It is an amenable number.

2051801 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051801 is an equidigital number, since it uses as much as digits as its factorization.

2051801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2051801 is about 1432.4109047337. The cubic root of 2051801 is about 127.0705995542.

Subtracting from 2051801 its reverse (1081502), we obtain a cube (970299 = 99³).

The spelling of 2051801 in words is "two million, fifty-one thousand, eight hundred one".