125378779 has 8 divisors (see below), whose sum is σ = 128605680. Its totient is φ = 122160000.

The previous prime is 125378753. The next prime is 125378797. The reversal of 125378779 is 977873521.

It is a happy number.

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 125378779 - 2⁷ = 125378651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125378749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40279 + ... + 43279.

It is an arithmetic number, because the mean of its divisors is an integer number (16075710).

Almost surely, 2^125378779 is an apocalyptic number.

125378779 is a deficient number, since it is larger than the sum of its proper divisors (3226901).

125378779 is a wasteful number, since it uses less digits than its factorization.

125378779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4061.

The product of its digits is 740880, while the sum is 49.

The square root of 125378779 is about 11197.2665860914. The cubic root of 125378779 is about 500.5045293956.

It can be divided in two parts, 12537 and 8779, that added together give a square (21316 = 146²).

The spelling of 125378779 in words is "one hundred twenty-five million, three hundred seventy-eight thousand, seven hundred seventy-nine".