4243252509 has 12 divisors (see below), whose sum is σ = 6220623136. Its totient is φ = 2786613192.

The previous prime is 4243252493. The next prime is 4243252511. The reversal of 4243252509 is 9052523424.

It is not a de Polignac number, because 4243252509 - 2⁴ = 4243252493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243252529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3517849 + ... + 3519054.

Almost surely, 2^4243252509 is an apocalyptic number.

It is an amenable number.

4243252509 is a deficient number, since it is larger than the sum of its proper divisors (1977370627).

4243252509 is a wasteful number, since it uses less digits than its factorization.

4243252509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036976 (or 7036973 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 4243252509 is about 65140.2526015980. The cubic root of 4243252509 is about 1618.9482210336.

The spelling of 4243252509 in words is "four billion, two hundred forty-three million, two hundred fifty-two thousand, five hundred nine".