127863121 has 4 divisors (see below), whose sum is σ = 127925092. Its totient is φ = 127801152.

The previous prime is 127863107. The next prime is 127863143. The reversal of 127863121 is 121368721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62980096 + 64883025 = 7936^2 + 8055^2 .

It is a cyclic number.

It is not a de Polignac number, because 127863121 - 2¹¹ = 127861073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127863191) 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, 27780 + ... + 32053.

It is an arithmetic number, because the mean of its divisors is an integer number (31981273).

Almost surely, 2^127863121 is an apocalyptic number.

It is an amenable number.

127863121 is a deficient number, since it is larger than the sum of its proper divisors (61971).

127863121 is an equidigital number, since it uses as much as digits as its factorization.

127863121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61970.

The product of its digits is 4032, while the sum is 31.

The square root of 127863121 is about 11307.6576265821. The cubic root of 127863121 is about 503.7887134547.

The spelling of 127863121 in words is "one hundred twenty-seven million, eight hundred sixty-three thousand, one hundred twenty-one".