128137071 has 16 divisors (see below), whose sum is σ = 179387136. Its totient is φ = 81202176.

The previous prime is 128137069. The next prime is 128137073. The reversal of 128137071 is 170731821.

It is an interprime number because it is at equal distance from previous prime (128137069) and next prime (128137073).

It is not a de Polignac number, because 128137071 - 2¹ = 128137069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128137073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5551 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (11211696).

Almost surely, 2^128137071 is an apocalyptic number.

128137071 is a deficient number, since it is larger than the sum of its proper divisors (51250065).

128137071 is a wasteful number, since it uses less digits than its factorization.

128137071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11582.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 128137071 is about 11319.7646176941. The cubic root of 128137071 is about 504.1482501966.

Adding to 128137071 its reverse (170731821), we get a palindrome (298868892).

The spelling of 128137071 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, seventy-one".