127670161 has 4 divisors (see below), whose sum is σ = 128934324. Its totient is φ = 126406000.

The previous prime is 127670117. The next prime is 127670197. The reversal of 127670161 is 161076721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161076721 = 13 ⋅12390517.

It can be written as a sum of positive squares in 2 ways, for example, as 64705936 + 62964225 = 8044^2 + 7935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127670161 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127671161) 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, 631930 + ... + 632131.

It is an arithmetic number, because the mean of its divisors is an integer number (32233581).

Almost surely, 2^127670161 is an apocalyptic number.

It is an amenable number.

127670161 is a deficient number, since it is larger than the sum of its proper divisors (1264163).

127670161 is a wasteful number, since it uses less digits than its factorization.

127670161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264162.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 127670161 is about 11299.1221340421. The cubic root of 127670161 is about 503.5351610327.

The spelling of 127670161 in words is "one hundred twenty-seven million, six hundred seventy thousand, one hundred sixty-one".