670121 has 4 divisors (see below), whose sum is σ = 672000. Its totient is φ = 668244.

The previous prime is 670099. The next prime is 670129. The reversal of 670121 is 121076.

It is a happy number.

670121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 670121 - 2¹⁸ = 407977 is a prime.

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

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 670121.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 670121.

It is not an unprimeable number, because it can be changed into a prime (670129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (168000).

2⁶⁷⁰¹²¹ is an apocalyptic number.

It is an amenable number.

670121 is a deficient number, since it is larger than the sum of its proper divisors (1879).

670121 is a wasteful number, since it uses less digits than its factorization.

670121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 670121 is about 818.6091863643. The cubic root of 670121 is about 87.5086685289.

Adding to 670121 its reverse (121076), we get a palindrome (791197).

The spelling of 670121 in words is "six hundred seventy thousand, one hundred twenty-one".