4621781 has 8 divisors (see below), whose sum is σ = 4953984. Its totient is φ = 4300560.

The previous prime is 4621777. The next prime is 4621823. The reversal of 4621781 is 1871264.

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 4621781 - 2² = 4621777 is a prime.

It is a super-2 number, since 2×4621781² = 42721719223922, 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 (4621711) 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 7 ways as a sum of consecutive naturals, for example, 1865 + ... + 3566.

It is an arithmetic number, because the mean of its divisors is an integer number (619248).

Almost surely, 2^4621781 is an apocalyptic number.

It is an amenable number.

4621781 is a deficient number, since it is larger than the sum of its proper divisors (332203).

4621781 is a wasteful number, since it uses less digits than its factorization.

4621781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5491.

The product of its digits is 2688, while the sum is 29.

The square root of 4621781 is about 2149.8327841951. The cubic root of 4621781 is about 166.5724298377.

The spelling of 4621781 in words is "four million, six hundred twenty-one thousand, seven hundred eighty-one".