128517941 has 8 divisors (see below), whose sum is σ = 130253760. Its totient is φ = 126791712.

The previous prime is 128517931. The next prime is 128517953. The reversal of 128517941 is 149715821.

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 128517941 - 2⁶ = 128517877 is a prime.

It is a super-2 number, since 2×128517941² = 33033722317758962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128517895 and 128517904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128517901) 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, 26945 + ... + 31353.

It is an arithmetic number, because the mean of its divisors is an integer number (16281720).

Almost surely, 2^128517941 is an apocalyptic number.

It is an amenable number.

128517941 is a deficient number, since it is larger than the sum of its proper divisors (1735819).

128517941 is a wasteful number, since it uses less digits than its factorization.

128517941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4795.

The product of its digits is 20160, while the sum is 38.

The square root of 128517941 is about 11336.5753647210. The cubic root of 128517941 is about 504.6472601240.

The spelling of 128517941 in words is "one hundred twenty-eight million, five hundred seventeen thousand, nine hundred forty-one".