2521830 has 16 divisors (see below), whose sum is σ = 6052464. Its totient is φ = 672480.

The previous prime is 2521829. The next prime is 2521843. The reversal of 2521830 is 381252.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2521797 and 2521806.

It is a congruent number.

It is an unprimeable number.

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, 42001 + ... + 42060.

It is an arithmetic number, because the mean of its divisors is an integer number (378279).

2^2521830 is an apocalyptic number.

2521830 is an abundant number, since it is smaller than the sum of its proper divisors (3530634).

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

2521830 is a wasteful number, since it uses less digits than its factorization.

2521830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84071.

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

The square root of 2521830 is about 1588.0270778548. The cubic root of 2521830 is about 136.1147747946.

The spelling of 2521830 in words is "two million, five hundred twenty-one thousand, eight hundred thirty".