128437 has 2 divisors, whose sum is σ = 128438. Its totient is φ = 128436.

The previous prime is 128431. The next prime is 128449. The reversal of 128437 is 734821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75076 + 53361 = 274^2 + 231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128437 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64218 + 64219.

It is an arithmetic number, because the mean of its divisors is an integer number (64219).

2¹²⁸⁴³⁷ is an apocalyptic number.

It is an amenable number.

128437 is a deficient number, since it is larger than the sum of its proper divisors (1).

128437 is an equidigital number, since it uses as much as digits as its factorization.

128437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 128437 is about 358.3810820900. The cubic root of 128437 is about 50.4541295069.

It can be divided in two parts, 128 and 437, that added together give a palindrome (565).

The spelling of 128437 in words is "one hundred twenty-eight thousand, four hundred thirty-seven".