12161025 has 18 divisors (see below), whose sum is σ = 21782150. Its totient is φ = 6485760.

The previous prime is 12161011. The next prime is 12161027. The reversal of 12161025 is 52016121.

It can be written as a sum of positive squares in 3 ways, for example, as 3640464 + 8520561 = 1908^2 + 2919^2 .

It is not a de Polignac number, because 12161025 - 2⁶ = 12160961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12160989 and 12161007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161027) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26800 + ... + 27249.

It is a Proth number, since it is equal to 2969 ⋅ 2¹² + 1 and 2969 < 2¹².

Almost surely, 2^12161025 is an apocalyptic number.

12161025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12161025 is a deficient number, since it is larger than the sum of its proper divisors (9621125).

12161025 is a wasteful number, since it uses less digits than its factorization.

12161025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54065 (or 54057 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 12161025 is about 3487.2661211901. The cubic root of 12161025 is about 229.9623441819.

Adding to 12161025 its reverse (52016121), we get a palindrome (64177146).

The spelling of 12161025 in words is "twelve million, one hundred sixty-one thousand, twenty-five".