2601820 has 24 divisors (see below), whose sum is σ = 5884704. Its totient is φ = 960576.

The previous prime is 2601817. The next prime is 2601821. The reversal of 2601820 is 281062.

2601820 = T₉₉ + T₁₀₀ + ... + T₂₅₄.

It is a happy number.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2601821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4744 + ... + 5263.

It is an arithmetic number, because the mean of its divisors is an integer number (245196).

2^2601820 is an apocalyptic number.

2601820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2601820 is an abundant number, since it is smaller than the sum of its proper divisors (3282884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2601820 is a wasteful number, since it uses less digits than its factorization.

2601820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10029 (or 10027 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2601820 is about 1613.0158089740. The cubic root of 2601820 is about 137.5389641641.

Adding to 2601820 its reverse (281062), we get a palindrome (2882882).

It can be divided in two parts, 260 and 1820, that added together give a triangular number (2080 = T₆₄).

The spelling of 2601820 in words is "two million, six hundred one thousand, eight hundred twenty".