125331131543402 has 24 divisors (see below), whose sum is σ = 189968747176620. Its totient is φ = 62014971448320.

The previous prime is 125331131543377. The next prime is 125331131543419. The reversal of 125331131543402 is 204345131133521.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 40840675830241 + 84490455713161 = 6390671^2 + 9191869^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 263383652 + ... + 263859072.

Almost surely, 2^{125331131543402} is an apocalyptic number.

125331131543402 is a deficient number, since it is larger than the sum of its proper divisors (64637615633218).

125331131543402 is an equidigital number, since it uses as much as digits as its factorization.

125331131543402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489626 (or 489529 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 125331131543402 its reverse (204345131133521), we get a palindrome (329676262676923).

The spelling of 125331131543402 in words is "one hundred twenty-five trillion, three hundred thirty-one billion, one hundred thirty-one million, five hundred forty-three thousand, four hundred two".