1271852397 has 24 divisors (see below), whose sum is σ = 1857694176. Its totient is φ = 838436256.

The previous prime is 1271852359. The next prime is 1271852411. The reversal of 1271852397 is 7932581721.

1271852397 is a `hidden beast` number, since 1 + 27 + 18 + 523 + 97 = 666.

It is not a de Polignac number, because 1271852397 - 2⁷ = 1271852269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271852317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 795603 + ... + 797199.

It is an arithmetic number, because the mean of its divisors is an integer number (77403924).

Almost surely, 2^1271852397 is an apocalyptic number.

It is an amenable number.

1271852397 is a deficient number, since it is larger than the sum of its proper divisors (585841779).

1271852397 is a wasteful number, since it uses less digits than its factorization.

1271852397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2534 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 1271852397 is about 35663.0396489138. The cubic root of 1271852397 is about 1083.4583915485.

The spelling of 1271852397 in words is "one billion, two hundred seventy-one million, eight hundred fifty-two thousand, three hundred ninety-seven".