128423151 has 20 divisors (see below), whose sum is σ = 203128992. Its totient is φ = 80578368.

The previous prime is 128423149. The next prime is 128423153. The reversal of 128423151 is 151324821.

It is an interprime number because it is at equal distance from previous prime (128423149) and next prime (128423153).

It is not a de Polignac number, because 128423151 - 2¹ = 128423149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128423153) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45255 + ... + 48008.

Almost surely, 2^128423151 is an apocalyptic number.

128423151 is a deficient number, since it is larger than the sum of its proper divisors (74705841).

128423151 is an equidigital number, since it uses as much as digits as its factorization.

128423151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93292 (or 93283 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 128423151 is about 11332.3938777295. The cubic root of 128423151 is about 504.5231599950.

Adding to 128423151 its reverse (151324821), we get a palindrome (279747972).

The spelling of 128423151 in words is "one hundred twenty-eight million, four hundred twenty-three thousand, one hundred fifty-one".