128667045 has 16 divisors (see below), whose sum is σ = 221703552. Its totient is φ = 63343680.

The previous prime is 128667043. The next prime is 128667047. The reversal of 128667045 is 540766821.

It is an interprime number because it is at equal distance from previous prime (128667043) and next prime (128667047).

It is not a de Polignac number, because 128667045 - 2¹ = 128667043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 128666994 and 128667012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128667043) 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, 329721 + ... + 330110.

It is an arithmetic number, because the mean of its divisors is an integer number (13856472).

Almost surely, 2^128667045 is an apocalyptic number.

128667045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128667045 is a deficient number, since it is larger than the sum of its proper divisors (93036507).

128667045 is a wasteful number, since it uses less digits than its factorization.

128667045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659852.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 128667045 is about 11343.1496948599. The cubic root of 128667045 is about 504.8423453238.

The spelling of 128667045 in words is "one hundred twenty-eight million, six hundred sixty-seven thousand, forty-five".