128977245 has 32 divisors (see below), whose sum is σ = 233193600. Its totient is φ = 67617792.

The previous prime is 128977159. The next prime is 128977271. The reversal of 128977245 is 542779821.

It is a happy number.

It is not a de Polignac number, because 128977245 - 2⁸ = 128976989 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 128977245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (7287300).

Almost surely, 2^128977245 is an apocalyptic number.

128977245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128977245 is a deficient number, since it is larger than the sum of its proper divisors (104216355).

128977245 is a wasteful number, since it uses less digits than its factorization.

128977245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16266 (or 16260 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 128977245 is about 11356.8149144027. The cubic root of 128977245 is about 505.2477234440.

The spelling of 128977245 in words is "one hundred twenty-eight million, nine hundred seventy-seven thousand, two hundred forty-five".