128474537 has 4 divisors (see below), whose sum is σ = 129050880. Its totient is φ = 127898196.

The previous prime is 128474531. The next prime is 128474543. The reversal of 128474537 is 735474821.

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 an emirpimes, since its reverse is a distinct semiprime: 735474821 = 157 ⋅4684553.

It is an interprime number because it is at equal distance from previous prime (128474531) and next prime (128474543).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128474537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128474494 and 128474503.

It is not an unprimeable number, because it can be changed into a prime (128474531) 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, 287837 + ... + 288282.

It is an arithmetic number, because the mean of its divisors is an integer number (32262720).

Almost surely, 2^128474537 is an apocalyptic number.

It is an amenable number.

128474537 is a deficient number, since it is larger than the sum of its proper divisors (576343).

128474537 is an equidigital number, since it uses as much as digits as its factorization.

128474537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576342.

The product of its digits is 188160, while the sum is 41.

The square root of 128474537 is about 11334.6608683277. The cubic root of 128474537 is about 504.5904426976.

The spelling of 128474537 in words is "one hundred twenty-eight million, four hundred seventy-four thousand, five hundred thirty-seven".