2780201 has 4 divisors (see below), whose sum is σ = 2876100. Its totient is φ = 2684304.

The previous prime is 2780179. The next prime is 2780203. The reversal of 2780201 is 1020872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 960400 + 1819801 = 980^2 + 1349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2780201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2780203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47906 + ... + 47963.

It is an arithmetic number, because the mean of its divisors is an integer number (719025).

2^2780201 is an apocalyptic number.

It is an amenable number.

2780201 is a deficient number, since it is larger than the sum of its proper divisors (95899).

2780201 is an equidigital number, since it uses as much as digits as its factorization.

2780201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95898.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2780201 is about 1667.3934748583. The cubic root of 2780201 is about 140.6129754986.

The spelling of 2780201 in words is "two million, seven hundred eighty thousand, two hundred one".