5001781 has 4 divisors (see below), whose sum is σ = 5035500. Its totient is φ = 4968064.

The previous prime is 5001779. The next prime is 5001809. The reversal of 5001781 is 1871005.

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

It can be written as a sum of positive squares in 2 ways, for example, as 443556 + 4558225 = 666^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 5001781 - 2¹ = 5001779 is a prime.

It is a super-2 number, since 2×5001781² = 50035626343922, 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 (5001701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16636 + ... + 16933.

It is an arithmetic number, because the mean of its divisors is an integer number (1258875).

Almost surely, 2^5001781 is an apocalyptic number.

It is an amenable number.

5001781 is a deficient number, since it is larger than the sum of its proper divisors (33719).

5001781 is a wasteful number, since it uses less digits than its factorization.

5001781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33718.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 5001781 is about 2236.4661857493. The cubic root of 5001781 is about 171.0178953719.

Adding to 5001781 its reverse (1871005), we get a palindrome (6872786).

The spelling of 5001781 in words is "five million, one thousand, seven hundred eighty-one".