128562273 has 24 divisors (see below), whose sum is σ = 212704128. Its totient is φ = 73300032.

The previous prime is 128562253. The next prime is 128562281. The reversal of 128562273 is 372265821.

128562273 is a `hidden beast` number, since 1 + 28 + 5 + 622 + 7 + 3 = 666.

It is not a de Polignac number, because 128562273 - 2⁵ = 128562241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128562223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29661 + ... + 33717.

It is an arithmetic number, because the mean of its divisors is an integer number (8862672).

Almost surely, 2^128562273 is an apocalyptic number.

It is an amenable number.

128562273 is a deficient number, since it is larger than the sum of its proper divisors (84141855).

128562273 is a wasteful number, since it uses less digits than its factorization.

128562273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573 (or 4570 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 128562273 is about 11338.5304603374. The cubic root of 128562273 is about 504.7052791323.

It can be divided in two parts, 12856 and 2273, that added together give a square (15129 = 123²).

The spelling of 128562273 in words is "one hundred twenty-eight million, five hundred sixty-two thousand, two hundred seventy-three".