2501801 has 4 divisors (see below), whose sum is σ = 2588100. Its totient is φ = 2415504.

The previous prime is 2501791. The next prime is 2501803. The reversal of 2501801 is 1081052.

2501801 = T₁₉₅ + T₁₉₆ + ... + T₂₈₁.

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 811801 + 1690000 = 901^2 + 1300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2501801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2501801.

It is not an unprimeable number, because it can be changed into a prime (2501803) 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, 43106 + ... + 43163.

It is an arithmetic number, because the mean of its divisors is an integer number (647025).

2^2501801 is an apocalyptic number.

It is an amenable number.

2501801 is a deficient number, since it is larger than the sum of its proper divisors (86299).

2501801 is an equidigital number, since it uses as much as digits as its factorization.

2501801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86298.

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

The square root of 2501801 is about 1581.7082537560. The cubic root of 2501801 is about 135.7534641142.

Adding to 2501801 its reverse (1081052), we get a palindrome (3582853).

The spelling of 2501801 in words is "two million, five hundred one thousand, eight hundred one".