127217642 has 4 divisors (see below), whose sum is σ = 190826466. Its totient is φ = 63608820.

The previous prime is 127217633. The next prime is 127217653. The reversal of 127217642 is 246712721.

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

It can be written as a sum of positive squares in only one way, i.e., 121462441 + 5755201 = 11021^2 + 2399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 127217599 and 127217608.

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, 31804409 + ... + 31804412.

Almost surely, 2^127217642 is an apocalyptic number.

127217642 is a deficient number, since it is larger than the sum of its proper divisors (63608824).

127217642 is an equidigital number, since it uses as much as digits as its factorization.

127217642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63608823.

The product of its digits is 9408, while the sum is 32.

The square root of 127217642 is about 11279.0798383556. The cubic root of 127217642 is about 502.9395403382.

The spelling of 127217642 in words is "one hundred twenty-seven million, two hundred seventeen thousand, six hundred forty-two".