131405452 has 12 divisors (see below), whose sum is σ = 230040216. Its totient is φ = 65679680.

The previous prime is 131405413. The next prime is 131405459. The reversal of 131405452 is 254504131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131405459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17508 + ... + 23860.

It is an arithmetic number, because the mean of its divisors is an integer number (19170018).

Almost surely, 2^131405452 is an apocalyptic number.

It is an amenable number.

131405452 is a deficient number, since it is larger than the sum of its proper divisors (98634764).

131405452 is a wasteful number, since it uses less digits than its factorization.

131405452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11528 (or 11526 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 131405452 is about 11463.2217111945. The cubic root of 131405452 is about 508.3987352442.

Adding to 131405452 its reverse (254504131), we get a palindrome (385909583).

The spelling of 131405452 in words is "one hundred thirty-one million, four hundred five thousand, four hundred fifty-two".