871321445 has 8 divisors (see below), whose sum is σ = 1055938680. Its totient is φ = 690155200.

The previous prime is 871321439. The next prime is 871321453. The reversal of 871321445 is 544123178.

It can be written as a sum of positive squares in 4 ways, for example, as 141943396 + 729378049 = 11914^2 + 27007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 871321445 - 2²⁸ = 602885989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 862190 + ... + 863199.

It is an arithmetic number, because the mean of its divisors is an integer number (131992335).

Almost surely, 2^871321445 is an apocalyptic number.

It is an amenable number.

871321445 is a deficient number, since it is larger than the sum of its proper divisors (184617235).

871321445 is a wasteful number, since it uses less digits than its factorization.

871321445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725495.

The product of its digits is 26880, while the sum is 35.

The square root of 871321445 is about 29518.1544985455. The cubic root of 871321445 is about 955.1233615301.

The spelling of 871321445 in words is "eight hundred seventy-one million, three hundred twenty-one thousand, four hundred forty-five".