1971136 has 28 divisors (see below), whose sum is σ = 4119880. Its totient is φ = 933120.

The previous prime is 1971127. The next prime is 1971143. The reversal of 1971136 is 6311791.

It is a congruent number.

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, 406 + ... + 2026.

2^1971136 is an apocalyptic number.

1971136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1971136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2059940).

1971136 is an abundant number, since it is smaller than the sum of its proper divisors (2148744).

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

1971136 is a wasteful number, since it uses less digits than its factorization.

1971136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1642 counting only the distinct ones).

The product of its digits is 1134, while the sum is 28.

The square root of 1971136 is about 1403.9715096824. The cubic root of 1971136 is about 125.3830595904.

The spelling of 1971136 in words is "one million, nine hundred seventy-one thousand, one hundred thirty-six".