128124492 has 24 divisors (see below), whose sum is σ = 300690096. Its totient is φ = 42460608.

The previous prime is 128124463. The next prime is 128124499. The reversal of 128124492 is 294421821.

It is not an unprimeable number, because it can be changed into a prime (128124499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28783 + ... + 32934.

It is an arithmetic number, because the mean of its divisors is an integer number (12528754).

Almost surely, 2^128124492 is an apocalyptic number.

128124492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128124492 is an abundant number, since it is smaller than the sum of its proper divisors (172565604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128124492 is a wasteful number, since it uses less digits than its factorization.

128124492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61897 (or 61895 counting only the distinct ones).

The product of its digits is 9216, while the sum is 33.

The square root of 128124492 is about 11319.2089829634. The cubic root of 128124492 is about 504.1317525291.

The spelling of 128124492 in words is "one hundred twenty-eight million, one hundred twenty-four thousand, four hundred ninety-two".