1261801 has 2 divisors, whose sum is σ = 1261802. Its totient is φ = 1261800.

The previous prime is 1261789. The next prime is 1261823. The reversal of 1261801 is 1081621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 301401 = 980^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 1261801 - 2⁵ = 1261769 is a prime.

1261801 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1261831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630900 + 630901.

It is an arithmetic number, because the mean of its divisors is an integer number (630901).

2^1261801 is an apocalyptic number.

It is an amenable number.

1261801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261801 is an equidigital number, since it uses as much as digits as its factorization.

1261801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1261801 is about 1123.2991587284. The cubic root of 1261801 is about 108.0596663901.

The spelling of 1261801 in words is "one million, two hundred sixty-one thousand, eight hundred one".