125577779 has 4 divisors (see below), whose sum is σ = 126536520. Its totient is φ = 124619040.

The previous prime is 125577773. The next prime is 125577787. The reversal of 125577779 is 977775521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125577779 - 2⁸ = 125577523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (125577773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479174 + ... + 479435.

It is an arithmetic number, because the mean of its divisors is an integer number (31634130).

Almost surely, 2^125577779 is an apocalyptic number.

125577779 is a deficient number, since it is larger than the sum of its proper divisors (958741).

125577779 is an equidigital number, since it uses as much as digits as its factorization.

125577779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958740.

The product of its digits is 1080450, while the sum is 50.

The square root of 125577779 is about 11206.1491601709. The cubic root of 125577779 is about 500.7691880926.

The spelling of 125577779 in words is "one hundred twenty-five million, five hundred seventy-seven thousand, seven hundred seventy-nine".