8871945 has 16 divisors (see below), whose sum is σ = 14236992. Its totient is φ = 4717760.

The previous prime is 8871931. The next prime is 8871991. The reversal of 8871945 is 5491788.

It is not a de Polignac number, because 8871945 - 2¹⁵ = 8839177 is a prime.

It is a super-2 number, since 2×8871945² = 157422816166050, which contains 22 as substring.

It is an Ulam number.

8871945 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8871897 and 8871906.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6274 + ... + 7556.

It is an arithmetic number, because the mean of its divisors is an integer number (889812).

Almost surely, 2^8871945 is an apocalyptic number.

It is an amenable number.

8871945 is a deficient number, since it is larger than the sum of its proper divisors (5365047).

8871945 is a wasteful number, since it uses less digits than its factorization.

8871945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

The product of its digits is 80640, while the sum is 42.

The square root of 8871945 is about 2978.5810380112. The cubic root of 8871945 is about 207.0171285040.

The spelling of 8871945 in words is "eight million, eight hundred seventy-one thousand, nine hundred forty-five".