4251085520 has 80 divisors (see below), whose sum is σ = 10811308032. Its totient is φ = 1541690880.

The previous prime is 4251085507. The next prime is 4251085537. The reversal of 4251085520 is 255801524.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 330734 + ... + 343346.

Almost surely, 2^4251085520 is an apocalyptic number.

4251085520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4251085520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5405654016).

4251085520 is an abundant number, since it is smaller than the sum of its proper divisors (6560222512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4251085520 is a wasteful number, since it uses less digits than its factorization.

4251085520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020 (or 13014 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 4251085520 is about 65200.3490788201. The cubic root of 4251085520 is about 1619.9437972678.

The spelling of 4251085520 in words is "four billion, two hundred fifty-one million, eighty-five thousand, five hundred twenty".