1672191 has 8 divisors (see below), whose sum is σ = 2477360. Its totient is φ = 1114776.

The previous prime is 1672129. The next prime is 1672199. The reversal of 1672191 is 1912761.

It is not a de Polignac number, because 1672191 - 2⁷ = 1672063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 61933 = 1672191 / (1 + 6 + 7 + 2 + 1 + 9 + 1).

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1672199) 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, 30940 + ... + 30993.

It is an arithmetic number, because the mean of its divisors is an integer number (309670).

2^1672191 is an apocalyptic number.

1672191 is a deficient number, since it is larger than the sum of its proper divisors (805169).

1672191 is an equidigital number, since it uses as much as digits as its factorization.

1672191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61942 (or 61936 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 1672191 is about 1293.1322438173. The cubic root of 1672191 is about 118.6939621103.

The spelling of 1672191 in words is "one million, six hundred seventy-two thousand, one hundred ninety-one".