4251320125 has 32 divisors (see below), whose sum is σ = 5733917280. Its totient is φ = 3128371200.

The previous prime is 4251320123. The next prime is 4251320149. The reversal of 4251320125 is 5210231524.

It can be written as a sum of positive squares in 16 ways, for example, as 3730522084 + 520798041 = 61078^2 + 22821^2 .

It is not a de Polignac number, because 4251320125 - 2¹ = 4251320123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 4251320125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251320123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 471661 + ... + 480589.

It is an arithmetic number, because the mean of its divisors is an integer number (179184915).

Almost surely, 2^4251320125 is an apocalyptic number.

It is an amenable number.

4251320125 is a deficient number, since it is larger than the sum of its proper divisors (1482597155).

4251320125 is a wasteful number, since it uses less digits than its factorization.

4251320125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250 (or 9240 counting only the distinct ones).

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

The square root of 4251320125 is about 65202.1481624647. The cubic root of 4251320125 is about 1619.9735967093.

Adding to 4251320125 its reverse (5210231524), we get a palindrome (9461551649).

The spelling of 4251320125 in words is "four billion, two hundred fifty-one million, three hundred twenty thousand, one hundred twenty-five".