4256501 has 2 divisors, whose sum is σ = 4256502. Its totient is φ = 4256500.

The previous prime is 4256491. The next prime is 4256507. The reversal of 4256501 is 1056524.

Added to its reverse (1056524) it gives a square (5313025 = 2305²).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3236401 + 1020100 = 1799^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 4256501 - 2¹⁰ = 4255477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4256507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2128250 + 2128251.

It is an arithmetic number, because the mean of its divisors is an integer number (2128251).

Almost surely, 2^4256501 is an apocalyptic number.

It is an amenable number.

4256501 is a deficient number, since it is larger than the sum of its proper divisors (1).

4256501 is an equidigital number, since it uses as much as digits as its factorization.

4256501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 4256501 is about 2063.1289344101. The cubic root of 4256501 is about 162.0631390323.

Adding to 4256501 its sum of digits (23), we get a palindrome (4256524).

Adding to 4256501 its reverse (1056524), we get a square (5313025 = 2305²).

The spelling of 4256501 in words is "four million, two hundred fifty-six thousand, five hundred one".