1672747 has 2 divisors, whose sum is σ = 1672748.
Its totient is φ = 1672746.
The previous prime is 1672663. The next prime is 1672751. The reversal of 1672747 is 7472761.
It is a strong prime.
It is an emirp because it is prime and its reverse (7472761) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1672747 is a prime.
It is an alternating number because its digits alternate between odd and even.
1672747 is a lucky number.
It is not a weakly prime, because it can be changed into another prime (1672787) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836373 + 836374.
It is an arithmetic number, because the mean of its divisors is an integer number (836374).
21672747 is an apocalyptic number.
1672747 is a deficient number, since it is larger than the sum of its proper divisors (1).
1672747 is an equidigital number, since it uses as much as digits as its factorization.
1672747 is an evil number, because the sum of its binary digits is even.
The product of its digits is 16464, while the sum is 34.
The square root of 1672747 is about 1293.3472078294.
The cubic root of 1672747 is about 118.7071158170.
It can be divided in two parts, 167274 and 7, that added together give a square (167281 = 4092).
The spelling of 1672747 in words is "one million, six hundred seventy-two thousand, seven hundred forty-seven".