4098871521 has 6 divisors (see below), whose sum is σ = 5920592210. Its totient is φ = 2732581008.

The previous prime is 4098871493. The next prime is 4098871549. The reversal of 4098871521 is 1251788904.

4098871521 is a `hidden beast` number, since 40 + 9 + 8 + 87 + 1 + 521 = 666.

It is an interprime number because it is at equal distance from previous prime (4098871493) and next prime (4098871549).

It can be written as a sum of positive squares in only one way, i.e., 2627075025 + 1471796496 = 51255^2 + 38364^2 .

It is not a de Polignac number, because 4098871521 - 2²² = 4094677217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4098871591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227715076 + ... + 227715093.

Almost surely, 2^4098871521 is an apocalyptic number.

It is an amenable number.

4098871521 is a deficient number, since it is larger than the sum of its proper divisors (1821720689).

4098871521 is a wasteful number, since it uses less digits than its factorization.

4098871521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455430175 (or 455430172 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 4098871521 is about 64022.4298273660. The cubic root of 4098871521 is about 1600.3738086237.

The spelling of 4098871521 in words is "four billion, ninety-eight million, eight hundred seventy-one thousand, five hundred twenty-one".