2520401 has 4 divisors (see below), whose sum is σ = 2714292. Its totient is φ = 2326512.

The previous prime is 2520383. The next prime is 2520431. The reversal of 2520401 is 1040252.

2520401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1560001 + 960400 = 1249^2 + 980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2520401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (2520431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96926 + ... + 96951.

It is an arithmetic number, because the mean of its divisors is an integer number (678573).

2^2520401 is an apocalyptic number.

It is an amenable number.

2520401 is a deficient number, since it is larger than the sum of its proper divisors (193891).

2520401 is a wasteful number, since it uses less digits than its factorization.

2520401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193890.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 2520401 is about 1587.5770847427. The cubic root of 2520401 is about 136.0890600340.

Adding to 2520401 its reverse (1040252), we get a palindrome (3560653).

The spelling of 2520401 in words is "two million, five hundred twenty thousand, four hundred one".