4252781 has 8 divisors (see below), whose sum is σ = 4600344. Its totient is φ = 3908160.

The previous prime is 4252777. The next prime is 4252793. The reversal of 4252781 is 1872524.

It can be written as a sum of positive squares in 4 ways, for example, as 292681 + 3960100 = 541^2 + 1990^2 .

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 4252781 - 2² = 4252777 is a prime.

It is a super-2 number, since 2×4252781² = 36172292467922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4252711) 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, 3011 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (575043).

Almost surely, 2^4252781 is an apocalyptic number.

It is an amenable number.

4252781 is a deficient number, since it is larger than the sum of its proper divisors (347563).

4252781 is a wasteful number, since it uses less digits than its factorization.

4252781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471.

The product of its digits is 4480, while the sum is 29.

The square root of 4252781 is about 2062.2271940793. The cubic root of 4252781 is about 162.0159131856.

The spelling of 4252781 in words is "four million, two hundred fifty-two thousand, seven hundred eighty-one".