4251217258 has 4 divisors (see below), whose sum is σ = 6376825890. Its totient is φ = 2125608628.

The previous prime is 4251217249. The next prime is 4251217273. The reversal of 4251217258 is 8527121524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3695059369 + 556157889 = 60787^2 + 23583^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1062804313 + ... + 1062804316.

Almost surely, 2^4251217258 is an apocalyptic number.

4251217258 is a deficient number, since it is larger than the sum of its proper divisors (2125608632).

4251217258 is a wasteful number, since it uses less digits than its factorization.

4251217258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125608631.

The product of its digits is 44800, while the sum is 37.

The square root of 4251217258 is about 65201.3593263208. The cubic root of 4251217258 is about 1619.9605307155.

The spelling of 4251217258 in words is "four billion, two hundred fifty-one million, two hundred seventeen thousand, two hundred fifty-eight".