1672091 has 2 divisors, whose sum is σ = 1672092. Its totient is φ = 1672090.

The previous prime is 1672087. The next prime is 1672117. The reversal of 1672091 is 1902761.

It is an a-pointer prime, because the next prime (1672117) can be obtained adding 1672091 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1672091 - 2² = 1672087 is a prime.

It is a Chen prime.

It is equal to p₁₂₆₁₈₈ and since 1672091 and 126188 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1672091.

It is not a weakly prime, because it can be changed into another prime (1672051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836045 + 836046.

It is an arithmetic number, because the mean of its divisors is an integer number (836046).

2^1672091 is an apocalyptic number.

1672091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672091 is an equidigital number, since it uses as much as digits as its factorization.

1672091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1672091 is about 1293.0935774336. The cubic root of 1672091 is about 118.6915960264.

The spelling of 1672091 in words is "one million, six hundred seventy-two thousand, ninety-one".