1870985 has 8 divisors (see below), whose sum is σ = 2266440. Its totient is φ = 1482624.

The previous prime is 1870961. The next prime is 1870991. The reversal of 1870985 is 5890781.

It can be written as a sum of positive squares in 4 ways, for example, as 204304 + 1666681 = 452^2 + 1291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1870985 is a prime.

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

It is a Curzon number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (283305).

2^1870985 is an apocalyptic number.

It is an amenable number.

1870985 is a deficient number, since it is larger than the sum of its proper divisors (395455).

1870985 is a wasteful number, since it uses less digits than its factorization.

1870985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 1870985 is about 1367.8395373727. The cubic root of 1870985 is about 123.2225244489. Note that the first 3 decimals are identical.

The spelling of 1870985 in words is "one million, eight hundred seventy thousand, nine hundred eighty-five".