1145920271 has 4 divisors (see below), whose sum is σ = 1145991600. Its totient is φ = 1145848944.

The previous prime is 1145920219. The next prime is 1145920313. The reversal of 1145920271 is 1720295411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1145920271 - 2²⁶ = 1078811407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145920871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995 + ... + 47883.

It is an arithmetic number, because the mean of its divisors is an integer number (286497900).

Almost surely, 2^1145920271 is an apocalyptic number.

1145920271 is a deficient number, since it is larger than the sum of its proper divisors (71329).

1145920271 is an equidigital number, since it uses as much as digits as its factorization.

1145920271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71328.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1145920271 is about 33851.4441494008. Note that the first 3 decimals coincide. The cubic root of 1145920271 is about 1046.4491607326.

The spelling of 1145920271 in words is "one billion, one hundred forty-five million, nine hundred twenty thousand, two hundred seventy-one".