127138454 has 4 divisors (see below), whose sum is σ = 190707684. Its totient is φ = 63569226.

The previous prime is 127138441. The next prime is 127138469. The reversal of 127138454 is 454831721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454831721 = 31 ⋅14671991.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 31784612 + ... + 31784615.

It is an arithmetic number, because the mean of its divisors is an integer number (47676921).

Almost surely, 2^127138454 is an apocalyptic number.

127138454 is a deficient number, since it is larger than the sum of its proper divisors (63569230).

127138454 is an equidigital number, since it uses as much as digits as its factorization.

127138454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63569229.

The product of its digits is 26880, while the sum is 35.

The square root of 127138454 is about 11275.5688991731. The cubic root of 127138454 is about 502.8351652895.

The spelling of 127138454 in words is "one hundred twenty-seven million, one hundred thirty-eight thousand, four hundred fifty-four".