1491996 has 48 divisors (see below), whose sum is σ = 3870720. Its totient is φ = 443520.

The previous prime is 1491991. The next prime is 1492009. The reversal of 1491996 is 6991941.

1491996 = 39² + 40² + ... + 165².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1491991) 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, 11685 + ... + 11811.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2^1491996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1491996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1935360).

1491996 is an abundant number, since it is smaller than the sum of its proper divisors (2378724).

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

1491996 is a wasteful number, since it uses less digits than its factorization.

1491996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 232 counting only the distinct ones).

The product of its digits is 17496, while the sum is 39.

The square root of 1491996 is about 1221.4728814018. The cubic root of 1491996 is about 114.2674545232.

Subtracting 1491996 from its reverse (6991941), we obtain a palindrome (5499945).

It can be divided in two parts, 149 and 1996, that added together give a triangular number (2145 = T₆₅).

The spelling of 1491996 in words is "one million, four hundred ninety-one thousand, nine hundred ninety-six".