2521420325 has 12 divisors (see below), whose sum is σ = 3139541988. Its totient is φ = 2008761600.

The previous prime is 2521420303. The next prime is 2521420339. The reversal of 2521420325 is 5230241252.

It can be written as a sum of positive squares in 6 ways, for example, as 116596804 + 2404823521 = 10798^2 + 49039^2 .

It is not a de Polignac number, because 2521420325 - 2¹² = 2521416229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2521420294 and 2521420303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203222 + ... + 215271.

It is an arithmetic number, because the mean of its divisors is an integer number (261628499).

Almost surely, 2^2521420325 is an apocalyptic number.

2521420325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2521420325 is a deficient number, since it is larger than the sum of its proper divisors (618121663).

2521420325 is a wasteful number, since it uses less digits than its factorization.

2521420325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418744 (or 418739 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2521420325 is about 50213.7463748723. The cubic root of 2521420325 is about 1361.0740371348.

Adding to 2521420325 its reverse (5230241252), we get a palindrome (7751661577).

The spelling of 2521420325 in words is "two billion, five hundred twenty-one million, four hundred twenty thousand, three hundred twenty-five".