125809522 has 8 divisors (see below), whose sum is σ = 189396396. Its totient is φ = 62677392.

The previous prime is 125809487. The next prime is 125809547. The reversal of 125809522 is 225908521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 124746561 + 1062961 = 11169^2 + 1031^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 112993 + ... + 114100.

Almost surely, 2^125809522 is an apocalyptic number.

125809522 is a deficient number, since it is larger than the sum of its proper divisors (63586874).

125809522 is a wasteful number, since it uses less digits than its factorization.

125809522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227372.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 125809522 is about 11216.4843868299. The cubic root of 125809522 is about 501.0770409663.

The spelling of 125809522 in words is "one hundred twenty-five million, eight hundred nine thousand, five hundred twenty-two".