12425052421 has 8 divisors (see below), whose sum is σ = 12555761400. Its totient is φ = 12294494400.

The previous prime is 12425052379. The next prime is 12425052439.

It is a happy number.

12425052421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 1710732321 + 10714320100 = 41361^2 + 103510^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12425052421 - 2⁹ = 12425051909 is a prime.

It is a super-2 number, since 2×12425052421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12425052421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12425052461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131715 + ... + 205423.

It is an arithmetic number, because the mean of its divisors is an integer number (1569470175).

Almost surely, 2^12425052421 is an apocalyptic number.

It is an amenable number.

12425052421 is a deficient number, since it is larger than the sum of its proper divisors (130708979).

12425052421 is a wasteful number, since it uses less digits than its factorization.

12425052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75479.

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

It can be divided in two parts, 124250 and 52421, that added together give a palindrome (176671).

The spelling of 12425052421 in words is "twelve billion, four hundred twenty-five million, fifty-two thousand, four hundred twenty-one".