127643745 has 8 divisors (see below), whose sum is σ = 204230016. Its totient is φ = 68076656.

The previous prime is 127643743. The next prime is 127643753. The reversal of 127643745 is 547346721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127643745 - 2¹ = 127643743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127643743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4254777 + ... + 4254806.

It is an arithmetic number, because the mean of its divisors is an integer number (25528752).

Almost surely, 2^127643745 is an apocalyptic number.

127643745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

127643745 is a deficient number, since it is larger than the sum of its proper divisors (76586271).

127643745 is an equidigital number, since it uses as much as digits as its factorization.

127643745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8509591.

The product of its digits is 141120, while the sum is 39.

The square root of 127643745 is about 11297.9531332007. The cubic root of 127643745 is about 503.5004301235.

The spelling of 127643745 in words is "one hundred twenty-seven million, six hundred forty-three thousand, seven hundred forty-five".