125705557 has 4 divisors (see below), whose sum is σ = 131171040. Its totient is φ = 120240076.

The previous prime is 125705543. The next prime is 125705561. The reversal of 125705557 is 755507521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125705557 - 2¹¹ = 125703509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125705507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2732707 + ... + 2732752.

It is an arithmetic number, because the mean of its divisors is an integer number (32792760).

Almost surely, 2^125705557 is an apocalyptic number.

It is an amenable number.

125705557 is a deficient number, since it is larger than the sum of its proper divisors (5465483).

125705557 is an equidigital number, since it uses as much as digits as its factorization.

125705557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465482.

The product of its (nonzero) digits is 61250, while the sum is 37.

The square root of 125705557 is about 11211.8489554578. The cubic root of 125705557 is about 500.9389782027.

The spelling of 125705557 in words is "one hundred twenty-five million, seven hundred five thousand, five hundred fifty-seven".