2520381 has 8 divisors (see below), whose sum is σ = 3376224. Its totient is φ = 1672400.

The previous prime is 2520379. The next prime is 2520383. The reversal of 2520381 is 1830252.

It is an interprime number because it is at equal distance from previous prime (2520379) and next prime (2520383).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2520381 - 2¹ = 2520379 is a prime.

It is a super-2 number, since 2×2520381² = 12704640770322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520383) 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, 1170 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (422028).

2^2520381 is an apocalyptic number.

It is an amenable number.

2520381 is a deficient number, since it is larger than the sum of its proper divisors (855843).

2520381 is a wasteful number, since it uses less digits than its factorization.

2520381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931.

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

The square root of 2520381 is about 1587.5707858234. The cubic root of 2520381 is about 136.0887000663.

The spelling of 2520381 in words is "two million, five hundred twenty thousand, three hundred eighty-one".