77125130 has 32 divisors (see below), whose sum is σ = 141253200. Its totient is φ = 30316032.

The previous prime is 77125129. The next prime is 77125159. The reversal of 77125130 is 3152177.

It can be written as a sum of positive squares in 8 ways, for example, as 71588521 + 5536609 = 8461^2 + 2353^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77125130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188366 + ... + 188774.

Almost surely, 2^77125130 is an apocalyptic number.

77125130 is a deficient number, since it is larger than the sum of its proper divisors (64128070).

77125130 is a wasteful number, since it uses less digits than its factorization.

77125130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 77125130 is about 8782.0914365543. The cubic root of 77125130 is about 425.6624133798.

The spelling of 77125130 in words is "seventy-seven million, one hundred twenty-five thousand, one hundred thirty".