4252071521 has 4 divisors (see below), whose sum is σ = 4252268544. Its totient is φ = 4251874500.

The previous prime is 4252071517. The next prime is 4252071539. The reversal of 4252071521 is 1251702524.

It is a happy number.

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 4252071521 - 2² = 4252071517 is a prime.

It is a super-2 number, since 2×4252071521² = 36160224439398506882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4252091521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61505 + ... + 110846.

It is an arithmetic number, because the mean of its divisors is an integer number (1063067136).

Almost surely, 2^4252071521 is an apocalyptic number.

It is an amenable number.

4252071521 is a deficient number, since it is larger than the sum of its proper divisors (197023).

4252071521 is a wasteful number, since it uses less digits than its factorization.

4252071521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197022.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 4252071521 is about 65207.9099573050. The cubic root of 4252071521 is about 1620.0690313774.

The spelling of 4252071521 in words is "four billion, two hundred fifty-two million, seventy-one thousand, five hundred twenty-one".