1971145192 has 16 divisors (see below), whose sum is σ = 3786041700. Its totient is φ = 961534080.

The previous prime is 1971145181. The next prime is 1971145201. The reversal of 1971145192 is 2915411791.

It can be written as a sum of positive squares in 2 ways, for example, as 1970116996 + 1028196 = 44386^2 + 1014^2 .

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, 3004467 + ... + 3005122.

Almost surely, 2^1971145192 is an apocalyptic number.

It is an amenable number.

1971145192 is a deficient number, since it is larger than the sum of its proper divisors (1814896508).

1971145192 is a wasteful number, since it uses less digits than its factorization.

1971145192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009636 (or 6009632 counting only the distinct ones).

The product of its digits is 22680, while the sum is 40.

The square root of 1971145192 is about 44397.5809250910. The cubic root of 1971145192 is about 1253.8325448970.

The spelling of 1971145192 in words is "one billion, nine hundred seventy-one million, one hundred forty-five thousand, one hundred ninety-two".