127522321 has 4 divisors (see below), whose sum is σ = 135023652. Its totient is φ = 120020992.

The previous prime is 127522303. The next prime is 127522331. The reversal of 127522321 is 123225721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57214096 + 70308225 = 7564^2 + 8385^2 .

It is a cyclic number.

It is not a de Polignac number, because 127522321 - 2¹¹ = 127520273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127522301) 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, 3750640 + ... + 3750673.

It is an arithmetic number, because the mean of its divisors is an integer number (33755913).

Almost surely, 2^127522321 is an apocalyptic number.

It is an amenable number.

127522321 is a deficient number, since it is larger than the sum of its proper divisors (7501331).

127522321 is an equidigital number, since it uses as much as digits as its factorization.

127522321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7501330.

The product of its digits is 1680, while the sum is 25.

The square root of 127522321 is about 11292.5781378745. The cubic root of 127522321 is about 503.3407240800.

The spelling of 127522321 in words is "one hundred twenty-seven million, five hundred twenty-two thousand, three hundred twenty-one".