127620217 has 4 divisors (see below), whose sum is σ = 128465536. Its totient is φ = 126774900.

The previous prime is 127620203. The next prime is 127620221. The reversal of 127620217 is 712026721.

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 not a de Polignac number, because 127620217 - 2⁷ = 127620089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127620247) 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, 422433 + ... + 422734.

It is an arithmetic number, because the mean of its divisors is an integer number (32116384).

Almost surely, 2^127620217 is an apocalyptic number.

It is an amenable number.

127620217 is a deficient number, since it is larger than the sum of its proper divisors (845319).

127620217 is an equidigital number, since it uses as much as digits as its factorization.

127620217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845318.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 127620217 is about 11296.9118346564. The cubic root of 127620217 is about 503.4694922292.

Adding to 127620217 its reverse (712026721), we get a palindrome (839646938).

The spelling of 127620217 in words is "one hundred twenty-seven million, six hundred twenty thousand, two hundred seventeen".