127047721 has 8 divisors (see below), whose sum is σ = 131397120. Its totient is φ = 122767008.

The previous prime is 127047691. The next prime is 127047763. The reversal of 127047721 is 127740721.

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

It is not a de Polignac number, because 127047721 - 2²⁵ = 93493289 is a prime.

It is a super-2 number, since 2×127047721² = 32282246822587682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127047121) 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, 13396 + ... + 20821.

It is an arithmetic number, because the mean of its divisors is an integer number (16424640).

Almost surely, 2^127047721 is an apocalyptic number.

It is an amenable number.

127047721 is a deficient number, since it is larger than the sum of its proper divisors (4349399).

127047721 is an equidigital number, since it uses as much as digits as its factorization.

127047721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34343.

The product of its (nonzero) digits is 5488, while the sum is 31.

The square root of 127047721 is about 11271.5447477265. The cubic root of 127047721 is about 502.7155198712.

The spelling of 127047721 in words is "one hundred twenty-seven million, forty-seven thousand, seven hundred twenty-one".