4557981 has 8 divisors (see below), whose sum is σ = 6177184. Its totient is φ = 2988720.

The previous prime is 4557977. The next prime is 4557983. The reversal of 4557981 is 1897554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4557981 - 2² = 4557977 is a prime.

It is a super-2 number, since 2×4557981² = 41550381592722, 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 (4557983) 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, 12271 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (772148).

Almost surely, 2^4557981 is an apocalyptic number.

It is an amenable number.

4557981 is a deficient number, since it is larger than the sum of its proper divisors (1619203).

4557981 is a wasteful number, since it uses less digits than its factorization.

4557981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24971.

The product of its digits is 50400, while the sum is 39.

The square root of 4557981 is about 2134.9428563781. The cubic root of 4557981 is about 165.8024092120.

The spelling of 4557981 in words is "four million, five hundred fifty-seven thousand, nine hundred eighty-one".