1672161 has 8 divisors (see below), whose sum is σ = 2237280. Its totient is φ = 1110912.

The previous prime is 1672129. The next prime is 1672199. The reversal of 1672161 is 1612761.

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

It is not a de Polignac number, because 1672161 - 2⁵ = 1672129 is a prime.

It is a super-2 number, since 2×1672161² = 5592244819842, which contains 22 as substring.

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

1672161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1672861) 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, 270 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (279660).

2^1672161 is an apocalyptic number.

It is an amenable number.

1672161 is a deficient number, since it is larger than the sum of its proper divisors (565119).

1672161 is a wasteful number, since it uses less digits than its factorization.

1672161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935.

The product of its digits is 504, while the sum is 24.

The square root of 1672161 is about 1293.1206440236. The cubic root of 1672161 is about 118.6932522950.

The spelling of 1672161 in words is "one million, six hundred seventy-two thousand, one hundred sixty-one".