4252121425 has 6 divisors (see below), whose sum is σ = 5272630598. Its totient is φ = 3401697120.

The previous prime is 4252121399. The next prime is 4252121429. The reversal of 4252121425 is 5241212524.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 15673681 + 4236447744 = 3959^2 + 65088^2 .

It is not a de Polignac number, because 4252121425 - 2⁹ = 4252120913 is a prime.

It is a super-2 number, since 2×4252121425² = 36161073225888061250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4252121393 and 4252121402.

It is not an unprimeable number, because it can be changed into a prime (4252121429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85042404 + ... + 85042453.

Almost surely, 2^4252121425 is an apocalyptic number.

It is an amenable number.

4252121425 is a deficient number, since it is larger than the sum of its proper divisors (1020509173).

4252121425 is a wasteful number, since it uses less digits than its factorization.

4252121425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170084867 (or 170084862 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 4252121425 is about 65208.2926091460. The cubic root of 4252121425 is about 1620.0753692771.

Adding to 4252121425 its reverse (5241212524), we get a palindrome (9493333949).

The spelling of 4252121425 in words is "four billion, two hundred fifty-two million, one hundred twenty-one thousand, four hundred twenty-five".