127478242 has 4 divisors (see below), whose sum is σ = 191217366. Its totient is φ = 63739120.

The previous prime is 127478207. The next prime is 127478249. The reversal of 127478242 is 242874721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242874721 = 103 ⋅2358007.

It can be written as a sum of positive squares in only one way, i.e., 124523281 + 2954961 = 11159^2 + 1719^2 .

It is not an unprimeable number, because it can be changed into a prime (127478249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31869559 + ... + 31869562.

Almost surely, 2^127478242 is an apocalyptic number.

127478242 is a deficient number, since it is larger than the sum of its proper divisors (63739124).

127478242 is an equidigital number, since it uses as much as digits as its factorization.

127478242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63739123.

The product of its digits is 50176, while the sum is 37.

The square root of 127478242 is about 11290.6262890949. The cubic root of 127478242 is about 503.2827229593.

The spelling of 127478242 in words is "one hundred twenty-seven million, four hundred seventy-eight thousand, two hundred forty-two".