12425661 has 6 divisors (see below), whose sum is σ = 17948190. Its totient is φ = 8283768.

The previous prime is 12425641. The next prime is 12425663. The reversal of 12425661 is 16652421.

12425661 is nontrivially palindromic in base 2.

12425661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12425625 + 36 = 3525^2 + 6^2 .

It is not a de Polignac number, because 12425661 - 2⁵ = 12425629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12425663) 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, 690306 + ... + 690323.

It is an arithmetic number, because the mean of its divisors is an integer number (2991365).

Almost surely, 2^12425661 is an apocalyptic number.

It is an amenable number.

12425661 is a deficient number, since it is larger than the sum of its proper divisors (5522529).

12425661 is a wasteful number, since it uses less digits than its factorization.

12425661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380635 (or 1380632 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 12425661 is about 3525.0051063793. The cubic root of 12425661 is about 231.6184585322.

It can be divided in two parts, 1242 and 5661, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 12425661 in words is "twelve million, four hundred twenty-five thousand, six hundred sixty-one".