2525403121 has 4 divisors (see below), whose sum is σ = 2525638644. Its totient is φ = 2525167600.

The previous prime is 2525403113. The next prime is 2525403157. The reversal of 2525403121 is 1213045252.

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 1260605025 + 1264798096 = 35505^2 + 35564^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525403121 - 2³ = 2525403113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2525403161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100870 + ... + 123391.

It is an arithmetic number, because the mean of its divisors is an integer number (631409661).

Almost surely, 2^2525403121 is an apocalyptic number.

It is an amenable number.

2525403121 is a deficient number, since it is larger than the sum of its proper divisors (235523).

2525403121 is a wasteful number, since it uses less digits than its factorization.

2525403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235522.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2525403121 is about 50253.3891493897. The cubic root of 2525403121 is about 1361.7903038666.

Adding to 2525403121 its reverse (1213045252), we get a palindrome (3738448373).

The spelling of 2525403121 in words is "two billion, five hundred twenty-five million, four hundred three thousand, one hundred twenty-one".