1672181 has 4 divisors (see below), whose sum is σ = 1911072. Its totient is φ = 1433292.

The previous prime is 1672129. The next prime is 1672199. The reversal of 1672181 is 1812761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1672181 - 2⁶ = 1672117 is a prime.

It is a super-2 number, since 2×1672181² = 5592378593522, which contains 22 as substring.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1672181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672081) 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, 119435 + ... + 119448.

It is an arithmetic number, because the mean of its divisors is an integer number (477768).

2^1672181 is an apocalyptic number.

It is an amenable number.

1672181 is a deficient number, since it is larger than the sum of its proper divisors (238891).

1672181 is an equidigital number, since it uses as much as digits as its factorization.

1672181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238890.

The product of its digits is 672, while the sum is 26.

The square root of 1672181 is about 1293.1283772310. The cubic root of 1672181 is about 118.6937255062.

The spelling of 1672181 in words is "one million, six hundred seventy-two thousand, one hundred eighty-one".