128547494 has 4 divisors (see below), whose sum is σ = 192821244. Its totient is φ = 64273746.

The previous prime is 128547493. The next prime is 128547499. The reversal of 128547494 is 494745821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128547493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32136872 + ... + 32136875.

It is an arithmetic number, because the mean of its divisors is an integer number (48205311).

Almost surely, 2^128547494 is an apocalyptic number.

128547494 is a deficient number, since it is larger than the sum of its proper divisors (64273750).

128547494 is an equidigital number, since it uses as much as digits as its factorization.

128547494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64273749.

The product of its digits is 322560, while the sum is 44.

The square root of 128547494 is about 11337.8787257582. The cubic root of 128547494 is about 504.6859387639.

The spelling of 128547494 in words is "one hundred twenty-eight million, five hundred forty-seven thousand, four hundred ninety-four".