125777805 has 16 divisors (see below), whose sum is σ = 202360704. Its totient is φ = 66709440.

The previous prime is 125777803. The next prime is 125777807. The reversal of 125777805 is 508777521.

It is an interprime number because it is at equal distance from previous prime (125777803) and next prime (125777807).

It is not a de Polignac number, because 125777805 - 2¹ = 125777803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125777801) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 20449 + ... + 25878.

It is an arithmetic number, because the mean of its divisors is an integer number (12647544).

Almost surely, 2^125777805 is an apocalyptic number.

125777805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125777805 is a deficient number, since it is larger than the sum of its proper divisors (76582899).

125777805 is a wasteful number, since it uses less digits than its factorization.

125777805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46516.

The product of its (nonzero) digits is 137200, while the sum is 42.

The square root of 125777805 is about 11215.0704411519. The cubic root of 125777805 is about 501.0349296964.

The spelling of 125777805 in words is "one hundred twenty-five million, seven hundred seventy-seven thousand, eight hundred five".