128306253 has 8 divisors (see below), whose sum is σ = 171277600. Its totient is φ = 85436208.

The previous prime is 128306239. The next prime is 128306263. The reversal of 128306253 is 352603821.

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

It is not a de Polignac number, because 128306253 - 2¹² = 128302157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128306253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128306263) 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, 22318 + ... + 27471.

It is an arithmetic number, because the mean of its divisors is an integer number (21409700).

Almost surely, 2^128306253 is an apocalyptic number.

It is an amenable number.

128306253 is a deficient number, since it is larger than the sum of its proper divisors (42971347).

128306253 is an equidigital number, since it uses as much as digits as its factorization.

128306253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50651.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 128306253 is about 11327.2350112461. The cubic root of 128306253 is about 504.3700317054.

The spelling of 128306253 in words is "one hundred twenty-eight million, three hundred six thousand, two hundred fifty-three".