127138747 has 4 divisors (see below), whose sum is σ = 133830280. Its totient is φ = 120447216.

The previous prime is 127138727. The next prime is 127138769. The reversal of 127138747 is 747831721.

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

It is a cyclic number.

It is not a de Polignac number, because 127138747 - 2¹⁹ = 126614459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127138717) 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, 3345738 + ... + 3345775.

It is an arithmetic number, because the mean of its divisors is an integer number (33457570).

Almost surely, 2^127138747 is an apocalyptic number.

127138747 is a deficient number, since it is larger than the sum of its proper divisors (6691533).

127138747 is an equidigital number, since it uses as much as digits as its factorization.

127138747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6691532.

The product of its digits is 65856, while the sum is 40.

The square root of 127138747 is about 11275.5818918582. The cubic root of 127138747 is about 502.8355515629.

The spelling of 127138747 in words is "one hundred twenty-seven million, one hundred thirty-eight thousand, seven hundred forty-seven".