1001964 has 12 divisors (see below), whose sum is σ = 2337944. Its totient is φ = 333984.

The previous prime is 1001953. The next prime is 1001977. The reversal of 1001964 is 4691001.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001964.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41737 + ... + 41760.

2^1001964 is an apocalyptic number.

It is an amenable number.

1001964 is an abundant number, since it is smaller than the sum of its proper divisors (1335980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001964 is a wasteful number, since it uses less digits than its factorization.

1001964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83504 (or 83502 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1001964 is about 1000.9815183109. The cubic root of 1001964 is about 100.0654238545.

Adding to 1001964 its reverse (4691001), we get a palindrome (5692965).

The spelling of 1001964 in words is "one million, one thousand, nine hundred sixty-four".