1321985 has 16 divisors (see below), whose sum is σ = 1835136. Its totient is φ = 895488.

The previous prime is 1321981. The next prime is 1321997. The reversal of 1321985 is 5891231.

It is a cyclic number.

It is not a de Polignac number, because 1321985 - 2² = 1321981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3569 + ... + 3921.

It is an arithmetic number, because the mean of its divisors is an integer number (114696).

2^1321985 is an apocalyptic number.

It is an amenable number.

1321985 is a deficient number, since it is larger than the sum of its proper divisors (513151).

1321985 is a wasteful number, since it uses less digits than its factorization.

1321985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472.

The product of its digits is 2160, while the sum is 29.

The square root of 1321985 is about 1149.7760651536. The cubic root of 1321985 is about 109.7510900797.

The spelling of 1321985 in words is "one million, three hundred twenty-one thousand, nine hundred eighty-five".