4250781 has 6 divisors (see below), whose sum is σ = 6140030. Its totient is φ = 2833848.

The previous prime is 4250777. The next prime is 4250809. The reversal of 4250781 is 1870524.

It can be written as a sum of positive squares in only one way, i.e., 4040100 + 210681 = 2010^2 + 459^2 .

It is not a de Polignac number, because 4250781 - 2² = 4250777 is a prime.

It is a super-2 number, since 2×4250781² = 36138278219922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

4250781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4250711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236146 + ... + 236163.

Almost surely, 2^4250781 is an apocalyptic number.

It is an amenable number.

4250781 is a deficient number, since it is larger than the sum of its proper divisors (1889249).

4250781 is a wasteful number, since it uses less digits than its factorization.

4250781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472315 (or 472312 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 4250781 is about 2061.7422244306. The cubic root of 4250781 is about 161.9905115613.

The spelling of 4250781 in words is "four million, two hundred fifty thousand, seven hundred eighty-one".