131206825 has 6 divisors (see below), whose sum is σ = 162696494. Its totient is φ = 104965440.

The previous prime is 131206819. The next prime is 131206841. The reversal of 131206825 is 528602131.

It can be written as a sum of positive squares in 3 ways, for example, as 7485696 + 123721129 = 2736^2 + 11123^2 .

It is not a de Polignac number, because 131206825 - 2¹⁷ = 131075753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131206793 and 131206802.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2624112 + ... + 2624161.

Almost surely, 2^131206825 is an apocalyptic number.

It is an amenable number.

131206825 is a deficient number, since it is larger than the sum of its proper divisors (31489669).

131206825 is an equidigital number, since it uses as much as digits as its factorization.

131206825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248283 (or 5248278 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 131206825 is about 11454.5547709197. The cubic root of 131206825 is about 508.1424479625.

Adding to 131206825 its reverse (528602131), we get a palindrome (659808956).

The spelling of 131206825 in words is "one hundred thirty-one million, two hundred six thousand, eight hundred twenty-five".