1670121 has 6 divisors (see below), whose sum is σ = 2412410. Its totient is φ = 1113408.

The previous prime is 1670093. The next prime is 1670129. The reversal of 1670121 is 1210761.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 404496 = 1125^2 + 636^2 .

It is not a de Polignac number, because 1670121 - 2⁵ = 1670089 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 = 1670094 and 1670103.

It is not an unprimeable number, because it can be changed into a prime (1670129) 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, 92776 + ... + 92793.

2^1670121 is an apocalyptic number.

It is an amenable number.

1670121 is a deficient number, since it is larger than the sum of its proper divisors (742289).

1670121 is a wasteful number, since it uses less digits than its factorization.

1670121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185575 (or 185572 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 1670121 is about 1292.3316137896. The cubic root of 1670121 is about 118.6449649257.

Adding to 1670121 its reverse (1210761), we get a palindrome (2880882).

The spelling of 1670121 in words is "one million, six hundred seventy thousand, one hundred twenty-one".