2509801 has 12 divisors (see below), whose sum is σ = 2946112. Its totient is φ = 2094264.

The previous prime is 2509777. The next prime is 2509807. The reversal of 2509801 is 1089052.

It is not a de Polignac number, because 2509801 - 2¹⁹ = 1985513 is a prime.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24316 + ... + 24418.

2^2509801 is an apocalyptic number.

It is an amenable number.

2509801 is a deficient number, since it is larger than the sum of its proper divisors (436311).

2509801 is an equidigital number, since it uses as much as digits as its factorization.

2509801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2509801 is about 1584.2351466875. The cubic root of 2509801 is about 135.8980096062.

The spelling of 2509801 in words is "two million, five hundred nine thousand, eight hundred one".