125780985 has 32 divisors (see below), whose sum is σ = 243941760. Its totient is φ = 60984000.

The previous prime is 125780983. The next prime is 125780987. The reversal of 125780985 is 589087521.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (125780983) and next prime (125780987).

It is not a de Polignac number, because 125780985 - 2¹ = 125780983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 125780985.

It is not an unprimeable number, because it can be changed into a prime (125780983) 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 31 ways as a sum of consecutive naturals, for example, 40866 + ... + 43835.

It is an arithmetic number, because the mean of its divisors is an integer number (7623180).

Almost surely, 2^125780985 is an apocalyptic number.

125780985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125780985 is a deficient number, since it is larger than the sum of its proper divisors (118160775).

125780985 is a wasteful number, since it uses less digits than its factorization.

125780985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84726 (or 84720 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The square root of 125780985 is about 11215.2122137746. The cubic root of 125780985 is about 501.0391521627.

The spelling of 125780985 in words is "one hundred twenty-five million, seven hundred eighty thousand, nine hundred eighty-five".