128874071 has 4 divisors (see below), whose sum is σ = 132357192. Its totient is φ = 125390952.

The previous prime is 128874061. The next prime is 128874073. The reversal of 128874071 is 170478821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128874071 is a prime.

It is a super-2 number, since 2×128874071² = 33217052352226082, 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 (128874073) 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, 1741505 + ... + 1741578.

It is an arithmetic number, because the mean of its divisors is an integer number (33089298).

Almost surely, 2^128874071 is an apocalyptic number.

128874071 is a deficient number, since it is larger than the sum of its proper divisors (3483121).

128874071 is an equidigital number, since it uses as much as digits as its factorization.

128874071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3483120.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 128874071 is about 11352.2716228956. The cubic root of 128874071 is about 505.1129649584.

The spelling of 128874071 in words is "one hundred twenty-eight million, eight hundred seventy-four thousand, seventy-one".