2520321 has 8 divisors (see below), whose sum is σ = 3382464. Its totient is φ = 1669200.

The previous prime is 2520319. The next prime is 2520347. The reversal of 2520321 is 1230252.

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

It is not a de Polignac number, because 2520321 - 2¹ = 2520319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2520321.

It is not an unprimeable number, because it can be changed into a prime (2520121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2205 + ... + 3146.

It is an arithmetic number, because the mean of its divisors is an integer number (422808).

2^2520321 is an apocalyptic number.

It is an amenable number.

2520321 is a deficient number, since it is larger than the sum of its proper divisors (862143).

2520321 is a wasteful number, since it uses less digits than its factorization.

2520321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2520321 is about 1587.5518889158. The cubic root of 2520321 is about 136.0876201520.

Adding to 2520321 its reverse (1230252), we get a palindrome (3750573).

The spelling of 2520321 in words is "two million, five hundred twenty thousand, three hundred twenty-one".