1971516 has 24 divisors (see below), whose sum is σ = 4842880. Its totient is φ = 622512.

The previous prime is 1971503. The next prime is 1971517. The reversal of 1971516 is 6151791.

1971516 is nontrivially palindromic in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1971517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4096 + ... + 4551.

2^1971516 is an apocalyptic number.

It is an amenable number.

1971516 is an abundant number, since it is smaller than the sum of its proper divisors (2871364).

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

1971516 is a wasteful number, since it uses less digits than its factorization.

1971516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8673 (or 8671 counting only the distinct ones).

The product of its digits is 1890, while the sum is 30.

The square root of 1971516 is about 1404.1068335422. The cubic root of 1971516 is about 125.3911162814.

The spelling of 1971516 in words is "one million, nine hundred seventy-one thousand, five hundred sixteen".