4455981 has 6 divisors (see below), whose sum is σ = 6436430. Its totient is φ = 2970648.

The previous prime is 4455977. The next prime is 4455991. The reversal of 4455981 is 1895544.

It can be written as a sum of positive squares in only one way, i.e., 4447881 + 8100 = 2109^2 + 90^2 .

It is not a de Polignac number, because 4455981 - 2² = 4455977 is a prime.

It is a super-2 number, since 2×4455981² = 39711533344722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4455901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 247546 + ... + 247563.

Almost surely, 2^4455981 is an apocalyptic number.

It is an amenable number.

4455981 is a deficient number, since it is larger than the sum of its proper divisors (1980449).

4455981 is a wasteful number, since it uses less digits than its factorization.

4455981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495115 (or 495112 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 4455981 is about 2110.9194679097. The cubic root of 4455981 is about 164.5562733414.

The spelling of 4455981 in words is "four million, four hundred fifty-five thousand, nine hundred eighty-one".