127972571 has 4 divisors (see below), whose sum is σ = 130070544. Its totient is φ = 125874600.

The previous prime is 127972567. The next prime is 127972573. The reversal of 127972571 is 175279721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175279721 = 8623 ⋅20327.

It is a cyclic number.

It is not a de Polignac number, because 127972571 - 2² = 127972567 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127972573) 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, 1048895 + ... + 1049016.

It is an arithmetic number, because the mean of its divisors is an integer number (32517636).

Almost surely, 2^127972571 is an apocalyptic number.

127972571 is a deficient number, since it is larger than the sum of its proper divisors (2097973).

127972571 is an equidigital number, since it uses as much as digits as its factorization.

127972571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097972.

The product of its digits is 61740, while the sum is 41.

The square root of 127972571 is about 11312.4962320436. The cubic root of 127972571 is about 503.9324190795.

The spelling of 127972571 in words is "one hundred twenty-seven million, nine hundred seventy-two thousand, five hundred seventy-one".