128014261 has 4 divisors (see below), whose sum is σ = 128037024. Its totient is φ = 127991500.

The previous prime is 128014253. The next prime is 128014273. The reversal of 128014261 is 162410821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 128014261 - 2³ = 128014253 is a prime.

It is a super-2 number, since 2×128014261² = 32775302038752242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128014231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3846 + ... + 16456.

It is an arithmetic number, because the mean of its divisors is an integer number (32009256).

Almost surely, 2^128014261 is an apocalyptic number.

It is an amenable number.

128014261 is a deficient number, since it is larger than the sum of its proper divisors (22763).

128014261 is a wasteful number, since it uses less digits than its factorization.

128014261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22762.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 128014261 is about 11314.3387345439. The cubic root of 128014261 is about 503.9871356526.

The spelling of 128014261 in words is "one hundred twenty-eight million, fourteen thousand, two hundred sixty-one".