127521 has 8 divisors (see below), whose sum is σ = 188960. Its totient is φ = 84996.

The previous prime is 127507. The next prime is 127529. The reversal of 127521 is 125721.

It is a de Polignac number, because none of the positive numbers 2^k-127521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 127494 and 127503.

It is not an unprimeable number, because it can be changed into a prime (127529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2335 + ... + 2388.

It is an arithmetic number, because the mean of its divisors is an integer number (23620).

2¹²⁷⁵²¹ is an apocalyptic number.

It is an amenable number.

127521 is a deficient number, since it is larger than the sum of its proper divisors (61439).

127521 is an equidigital number, since it uses as much as digits as its factorization.

127521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732 (or 4726 counting only the distinct ones).

The product of its digits is 140, while the sum is 18.

The square root of 127521 is about 357.1008260982. The cubic root of 127521 is about 50.3338986043. Note that the first 3 decimals are identical.

It can be divided in two parts, 1275 and 21, that added together give a 4-th power (1296 = 6⁴).

The spelling of 127521 in words is "one hundred twenty-seven thousand, five hundred twenty-one".