140128455 has 8 divisors (see below), whose sum is σ = 224205552. Its totient is φ = 74735168.

The previous prime is 140128427. The next prime is 140128459. The reversal of 140128455 is 554821041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140128455 - 2⁷ = 140128327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140128459) 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, 4670934 + ... + 4670963.

It is an arithmetic number, because the mean of its divisors is an integer number (28025694).

Almost surely, 2^140128455 is an apocalyptic number.

140128455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140128455 is a deficient number, since it is larger than the sum of its proper divisors (84077097).

140128455 is an equidigital number, since it uses as much as digits as its factorization.

140128455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9341905.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 140128455 is about 11837.5865361145. The cubic root of 140128455 is about 519.4081715981.

Adding to 140128455 its reverse (554821041), we get a palindrome (694949496).

The spelling of 140128455 in words is "one hundred forty million, one hundred twenty-eight thousand, four hundred fifty-five".