1672147 has 4 divisors (see below), whose sum is σ = 1674760. Its totient is φ = 1669536.

The previous prime is 1672129. The next prime is 1672199. The reversal of 1672147 is 7412761.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7412761 = 823 ⋅9007.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672147 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672117) 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 in 3 ways as a sum of consecutive naturals, for example, 379 + ... + 1867.

It is an arithmetic number, because the mean of its divisors is an integer number (418690).

2^1672147 is an apocalyptic number.

1672147 is a deficient number, since it is larger than the sum of its proper divisors (2613).

1672147 is a wasteful number, since it uses less digits than its factorization.

1672147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2612.

The product of its digits is 2352, while the sum is 28.

The square root of 1672147 is about 1293.1152307509. The cubic root of 1672147 is about 118.6929210450.

The spelling of 1672147 in words is "one million, six hundred seventy-two thousand, one hundred forty-seven".