125783765 has 8 divisors (see below), whose sum is σ = 159819480. Its totient is φ = 94707712.

The previous prime is 125783753. The next prime is 125783773. The reversal of 125783765 is 567387521.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16434916 + 109348849 = 4054^2 + 10457^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 125783765 - 2²⁰ = 124735189 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 739820 + ... + 739989.

It is an arithmetic number, because the mean of its divisors is an integer number (19977435).

Almost surely, 2^125783765 is an apocalyptic number.

It is an amenable number.

125783765 is a deficient number, since it is larger than the sum of its proper divisors (34035715).

125783765 is a wasteful number, since it uses less digits than its factorization.

125783765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479831.

The product of its digits is 352800, while the sum is 44.

The square root of 125783765 is about 11215.3361518949. The cubic root of 125783765 is about 501.0428434430.

The spelling of 125783765 in words is "one hundred twenty-five million, seven hundred eighty-three thousand, seven hundred sixty-five".