128612743 has 16 divisors (see below), whose sum is σ = 151200000. Its totient is φ = 107122752.

The previous prime is 128612719. The next prime is 128612749. The reversal of 128612743 is 347216821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128612743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128612699 and 128612708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128612749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35008 + ... + 38506.

It is an arithmetic number, because the mean of its divisors is an integer number (9450000).

Almost surely, 2^128612743 is an apocalyptic number.

128612743 is a deficient number, since it is larger than the sum of its proper divisors (22587257).

128612743 is an equidigital number, since it uses as much as digits as its factorization.

128612743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654.

The product of its digits is 16128, while the sum is 34.

The square root of 128612743 is about 11340.7558390083. The cubic root of 128612743 is about 504.7713149459.

The spelling of 128612743 in words is "one hundred twenty-eight million, six hundred twelve thousand, seven hundred forty-three".