1670401 has 4 divisors (see below), whose sum is σ = 1701972. Its totient is φ = 1638832.

The previous prime is 1670399. The next prime is 1670407. The reversal of 1670401 is 1040761.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 672400 + 998001 = 820^2 + 999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670401 - 2¹ = 1670399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670407) 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, 15706 + ... + 15811.

It is an arithmetic number, because the mean of its divisors is an integer number (425493).

2^1670401 is an apocalyptic number.

It is an amenable number.

1670401 is a deficient number, since it is larger than the sum of its proper divisors (31571).

1670401 is an equidigital number, since it uses as much as digits as its factorization.

1670401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31570.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1670401 is about 1292.4399405775. The cubic root of 1670401 is about 118.6515949311.

The spelling of 1670401 in words is "one million, six hundred seventy thousand, four hundred one".