128431254 has 24 divisors (see below), whose sum is σ = 298799928. Its totient is φ = 36694560.

The previous prime is 128431249. The next prime is 128431267. The reversal of 128431254 is 452134821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218127 + ... + 218714.

It is an arithmetic number, because the mean of its divisors is an integer number (12449997).

Almost surely, 2^128431254 is an apocalyptic number.

128431254 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128431254 is an abundant number, since it is smaller than the sum of its proper divisors (170368674).

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

128431254 is a wasteful number, since it uses less digits than its factorization.

128431254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436860 (or 436853 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 128431254 is about 11332.7513870198. The cubic root of 128431254 is about 504.5337709198.

The spelling of 128431254 in words is "one hundred twenty-eight million, four hundred thirty-one thousand, two hundred fifty-four".