6487528121 has 4 divisors (see below), whose sum is σ = 6638400912. Its totient is φ = 6336655332.

The previous prime is 6487528081. The next prime is 6487528127. The reversal of 6487528121 is 1218257846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6487528121 - 2⁶ = 6487528057 is a prime.

It is a super-2 number, since 2×6487528121² = 84176042241531581282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6487528127) 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, 75436331 + ... + 75436416.

It is an arithmetic number, because the mean of its divisors is an integer number (1659600228).

Almost surely, 2^6487528121 is an apocalyptic number.

It is an amenable number.

6487528121 is a deficient number, since it is larger than the sum of its proper divisors (150872791).

6487528121 is a wasteful number, since it uses less digits than its factorization.

6487528121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150872790.

The product of its digits is 215040, while the sum is 44.

The square root of 6487528121 is about 80545.1930347181. The cubic root of 6487528121 is about 1865.0611878235.

The spelling of 6487528121 in words is "six billion, four hundred eighty-seven million, five hundred twenty-eight thousand, one hundred twenty-one".