127120691 has 4 divisors (see below), whose sum is σ = 127974000. Its totient is φ = 126267384.

The previous prime is 127120673. The next prime is 127120699. The reversal of 127120691 is 196021721.

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

It is a cyclic number.

It is not a de Polignac number, because 127120691 - 2⁶ = 127120627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127120699) 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, 426431 + ... + 426728.

It is an arithmetic number, because the mean of its divisors is an integer number (31993500).

Almost surely, 2^127120691 is an apocalyptic number.

127120691 is a deficient number, since it is larger than the sum of its proper divisors (853309).

127120691 is an equidigital number, since it uses as much as digits as its factorization.

127120691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853308.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 127120691 is about 11274.7811952162. The cubic root of 127120691 is about 502.8117465237.

The spelling of 127120691 in words is "one hundred twenty-seven million, one hundred twenty thousand, six hundred ninety-one".