670401 has 6 divisors (see below), whose sum is σ = 968370. Its totient is φ = 446928.

The previous prime is 670399. The next prime is 670409. The reversal of 670401 is 104076.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 62001 = 780^2 + 249^2 .

It is not a de Polignac number, because 670401 - 2¹ = 670399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (670409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37236 + ... + 37253.

It is an arithmetic number, because the mean of its divisors is an integer number (161395).

2⁶⁷⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

670401 is a deficient number, since it is larger than the sum of its proper divisors (297969).

670401 is a wasteful number, since it uses less digits than its factorization.

670401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74495 (or 74492 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 670401 is about 818.7801902831. The cubic root of 670401 is about 87.5208548930.

Adding to 670401 its reverse (104076), we get a palindrome (774477).

It can be divided in two parts, 6 and 70401, that added together give a palindrome (70407).

The spelling of 670401 in words is "six hundred seventy thousand, four hundred one".