3125820 has 48 divisors (see below), whose sum is σ = 8910720. Its totient is φ = 818496.

The previous prime is 3125819. The next prime is 3125821. The reversal of 3125820 is 285213.

It is an interprime number because it is at equal distance from previous prime (3125819) and next prime (3125821).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125821) 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 15 ways as a sum of consecutive naturals, for example, 3099 + ... + 3981.

It is an arithmetic number, because the mean of its divisors is an integer number (185640).

Almost surely, 2^3125820 is an apocalyptic number.

3125820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3125820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4455360).

3125820 is an abundant number, since it is smaller than the sum of its proper divisors (5784900).

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

3125820 is a wasteful number, since it uses less digits than its factorization.

3125820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 3125820 is about 1767.9988687779. The cubic root of 3125820 is about 146.2136734966.

The spelling of 3125820 in words is "three million, one hundred twenty-five thousand, eight hundred twenty".