125521335 has 24 divisors (see below), whose sum is σ = 218456784. Its totient is φ = 66672000.

The previous prime is 125521321. The next prime is 125521337. The reversal of 125521335 is 533125521.

It is a happy number.

It is not a de Polignac number, because 125521335 - 2⁶ = 125521271 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125521299 and 125521308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125521337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5739 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (9102366).

Almost surely, 2^125521335 is an apocalyptic number.

125521335 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125521335 is a deficient number, since it is larger than the sum of its proper divisors (92935449).

125521335 is a wasteful number, since it uses less digits than its factorization.

125521335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375 (or 11372 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 125521335 is about 11203.6304383892. The cubic root of 125521335 is about 500.6941492011.

Adding to 125521335 its reverse (533125521), we get a palindrome (658646856).

The spelling of 125521335 in words is "one hundred twenty-five million, five hundred twenty-one thousand, three hundred thirty-five".