1591964 has 24 divisors (see below), whose sum is σ = 3078768. Its totient is φ = 714240.

The previous prime is 1591949. The next prime is 1591969. The reversal of 1591964 is 4691951.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591969) 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, 4082 + ... + 4454.

It is an arithmetic number, because the mean of its divisors is an integer number (128282).

2^1591964 is an apocalyptic number.

It is an amenable number.

1591964 is a deficient number, since it is larger than the sum of its proper divisors (1486804).

1591964 is a wasteful number, since it uses less digits than its factorization.

1591964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 483 counting only the distinct ones).

The product of its digits is 9720, while the sum is 35.

The square root of 1591964 is about 1261.7305576073. The cubic root of 1591964 is about 116.7645690681.

The spelling of 1591964 in words is "one million, five hundred ninety-one thousand, nine hundred sixty-four".