127257197 has 4 divisors (see below), whose sum is σ = 128038080. Its totient is φ = 126476316.

The previous prime is 127257161. The next prime is 127257211. The reversal of 127257197 is 791752721.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 127257197 - 2¹⁸ = 126995053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127257107) 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, 390197 + ... + 390522.

It is an arithmetic number, because the mean of its divisors is an integer number (32009520).

Almost surely, 2^127257197 is an apocalyptic number.

It is an amenable number.

127257197 is a deficient number, since it is larger than the sum of its proper divisors (780883).

127257197 is an equidigital number, since it uses as much as digits as its factorization.

127257197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780882.

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

The square root of 127257197 is about 11280.8331695846. The cubic root of 127257197 is about 502.9916602374.

The spelling of 127257197 in words is "one hundred twenty-seven million, two hundred fifty-seven thousand, one hundred ninety-seven".