1971312 has 40 divisors (see below), whose sum is σ = 5821056. Its totient is φ = 563136.

The previous prime is 1971289. The next prime is 1971313. The reversal of 1971312 is 2131791.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971313) 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, 2598 + ... + 3269.

2^1971312 is an apocalyptic number.

1971312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1971312 is an abundant number, since it is smaller than the sum of its proper divisors (3849744).

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

1971312 is a wasteful number, since it uses less digits than its factorization.

1971312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5885 (or 5879 counting only the distinct ones).

The product of its digits is 378, while the sum is 24.

The square root of 1971312 is about 1404.0341876180. The cubic root of 1971312 is about 125.3867912391.

The spelling of 1971312 in words is "one million, nine hundred seventy-one thousand, three hundred twelve".