131123425 has 6 divisors (see below), whose sum is σ = 162593078. Its totient is φ = 104898720.

The previous prime is 131123423. The next prime is 131123441. The reversal of 131123425 is 524321131.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1140624 + 129982801 = 1068^2 + 11401^2 .

It is not a de Polignac number, because 131123425 - 2¹ = 131123423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131123396 and 131123405.

It is not an unprimeable number, because it can be changed into a prime (131123423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2622444 + ... + 2622493.

Almost surely, 2^131123425 is an apocalyptic number.

It is an amenable number.

131123425 is a deficient number, since it is larger than the sum of its proper divisors (31469653).

131123425 is an equidigital number, since it uses as much as digits as its factorization.

131123425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5244947 (or 5244942 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 131123425 is about 11450.9137190008. The cubic root of 131123425 is about 508.0347603160.

Adding to 131123425 its reverse (524321131), we get a palindrome (655444556).

The spelling of 131123425 in words is "one hundred thirty-one million, one hundred twenty-three thousand, four hundred twenty-five".