127978745 has 16 divisors (see below), whose sum is σ = 158455440. Its totient is φ = 99154944.

The previous prime is 127978733. The next prime is 127978751. The reversal of 127978745 is 547879721.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 15555136 + 112423609 = 3944^2 + 10603^2 .

It is a cyclic number.

It is not a de Polignac number, because 127978745 - 2⁶ = 127978681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 127978693 and 127978702.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41621 + ... + 44589.

It is an arithmetic number, because the mean of its divisors is an integer number (9903465).

Almost surely, 2^127978745 is an apocalyptic number.

It is an amenable number.

127978745 is a deficient number, since it is larger than the sum of its proper divisors (30476695).

127978745 is a wasteful number, since it uses less digits than its factorization.

127978745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244.

The product of its digits is 987840, while the sum is 50.

The square root of 127978745 is about 11312.7691128211. The cubic root of 127978745 is about 503.9405229743.

The spelling of 127978745 in words is "one hundred twenty-seven million, nine hundred seventy-eight thousand, seven hundred forty-five".