131205652 has 12 divisors (see below), whose sum is σ = 229895316. Its totient is φ = 65521280.

The previous prime is 131205637. The next prime is 131205661. The reversal of 131205652 is 256502131.

It can be written as a sum of positive squares in 2 ways, for example, as 67141636 + 64064016 = 8194^2 + 8004^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16693 + ... + 23260.

It is an arithmetic number, because the mean of its divisors is an integer number (19157943).

Almost surely, 2^131205652 is an apocalyptic number.

It is an amenable number.

131205652 is a deficient number, since it is larger than the sum of its proper divisors (98689664).

131205652 is a wasteful number, since it uses less digits than its factorization.

131205652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40778 (or 40776 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 131205652 is about 11454.5035684660. The cubic root of 131205652 is about 508.1409336793.

Adding to 131205652 its reverse (256502131), we get a palindrome (387707783).

The spelling of 131205652 in words is "one hundred thirty-one million, two hundred five thousand, six hundred fifty-two".