672401 has 8 divisors (see below), whose sum is σ = 731880. Its totient is φ = 615168.

The previous prime is 672379. The next prime is 672439. The reversal of 672401 is 104276.

It is a Cunningham number, because it is equal to 820²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 313600 + 358801 = 560^2 + 599^2 .

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 672401 - 2¹⁸ = 410257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (672901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (91485).

2⁶⁷²⁴⁰¹ is an apocalyptic number.

It is an amenable number.

672401 is a deficient number, since it is larger than the sum of its proper divisors (59479).

672401 is a wasteful number, since it uses less digits than its factorization.

672401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 672401 is about 820.0006097559. Note that the first 3 decimals coincide. The cubic root of 672401 is about 87.6078018252.

Adding to 672401 its reverse (104276), we get a palindrome (776677).

The spelling of 672401 in words is "six hundred seventy-two thousand, four hundred one".