4256002421 has 8 divisors (see below), whose sum is σ = 4741697664. Its totient is φ = 3786771520.

The previous prime is 4256002403. The next prime is 4256002427. The reversal of 4256002421 is 1242006524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4256002421 - 2³⁰ = 3182260597 is a prime.

It is a super-2 number, since 2×4256002421² = 36227113215115722482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256002427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4115540 + ... + 4116573.

It is an arithmetic number, because the mean of its divisors is an integer number (592712208).

Almost surely, 2^4256002421 is an apocalyptic number.

It is an amenable number.

4256002421 is a deficient number, since it is larger than the sum of its proper divisors (485695243).

4256002421 is a wasteful number, since it uses less digits than its factorization.

4256002421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8232171.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4256002421 is about 65238.0442763270. The cubic root of 4256002421 is about 1620.5681110921.

Adding to 4256002421 its reverse (1242006524), we get a palindrome (5498008945).

The spelling of 4256002421 in words is "four billion, two hundred fifty-six million, two thousand, four hundred twenty-one".