1672121 has 8 divisors (see below), whose sum is σ = 1850688. Its totient is φ = 1498000.

The previous prime is 1672117. The next prime is 1672129. The reversal of 1672121 is 1212761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1672121 - 2² = 1672117 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1672093 and 1672102.

It is not an unprimeable number, because it can be changed into a prime (1672129) 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 7 ways as a sum of consecutive naturals, for example, 290 + ... + 1851.

It is an arithmetic number, because the mean of its divisors is an integer number (231336).

2^1672121 is an apocalyptic number.

1672121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1672121 is a deficient number, since it is larger than the sum of its proper divisors (178567).

1672121 is a wasteful number, since it uses less digits than its factorization.

1672121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223.

The product of its digits is 168, while the sum is 20.

The square root of 1672121 is about 1293.1051774701. The cubic root of 1672121 is about 118.6923058615.

Adding to 1672121 its reverse (1212761), we get a palindrome (2884882).

The spelling of 1672121 in words is "one million, six hundred seventy-two thousand, one hundred twenty-one".