127725157 has 4 divisors (see below), whose sum is σ = 145971616. Its totient is φ = 109478700.

The previous prime is 127725133. The next prime is 127725167. The reversal of 127725157 is 751527721.

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 a de Polignac number, because none of the positive numbers 2^k-127725157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127725167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9123219 + ... + 9123232.

It is an arithmetic number, because the mean of its divisors is an integer number (36492904).

Almost surely, 2^127725157 is an apocalyptic number.

It is an amenable number.

127725157 is a deficient number, since it is larger than the sum of its proper divisors (18246459).

127725157 is an equidigital number, since it uses as much as digits as its factorization.

127725157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18246458.

The product of its digits is 34300, while the sum is 37.

The square root of 127725157 is about 11301.5555124062. Note that the first 4 decimals coincide. The cubic root of 127725157 is about 503.6074526424.

The spelling of 127725157 in words is "one hundred twenty-seven million, seven hundred twenty-five thousand, one hundred fifty-seven".