1945985 has 8 divisors (see below), whose sum is σ = 2361960. Its totient is φ = 1538944.

The previous prime is 1945981. The next prime is 1945991. The reversal of 1945985 is 5895491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 71824 + 1874161 = 268^2 + 1369^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1945985 - 2² = 1945981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1945981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742 + ... + 2631.

It is an arithmetic number, because the mean of its divisors is an integer number (295245).

2^1945985 is an apocalyptic number.

It is an amenable number.

1945985 is a deficient number, since it is larger than the sum of its proper divisors (415975).

1945985 is an equidigital number, since it uses as much as digits as its factorization.

1945985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4467.

The product of its digits is 64800, while the sum is 41.

The square root of 1945985 is about 1394.9856630088. The cubic root of 1945985 is about 124.8474940111.

The spelling of 1945985 in words is "one million, nine hundred forty-five thousand, nine hundred eighty-five".