128395451 has 4 divisors (see below), whose sum is σ = 129245904. Its totient is φ = 127545000.

The previous prime is 128395433. The next prime is 128395469. The reversal of 128395451 is 154593821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (128395433) and next prime (128395469).

It is a cyclic number.

It is not a de Polignac number, because 128395451 - 2¹⁸ = 128133307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128395481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425000 + ... + 425301.

It is an arithmetic number, because the mean of its divisors is an integer number (32311476).

Almost surely, 2^128395451 is an apocalyptic number.

128395451 is a deficient number, since it is larger than the sum of its proper divisors (850453).

128395451 is an equidigital number, since it uses as much as digits as its factorization.

128395451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850452.

The product of its digits is 43200, while the sum is 38.

The square root of 128395451 is about 11331.1716516872. The cubic root of 128395451 is about 504.4868833156.

The spelling of 128395451 in words is "one hundred twenty-eight million, three hundred ninety-five thousand, four hundred fifty-one".