4421457 has 6 divisors (see below), whose sum is σ = 6386562. Its totient is φ = 2947632.

The previous prime is 4421449. The next prime is 4421467. The reversal of 4421457 is 7541244.

It can be written as a sum of positive squares in only one way, i.e., 2702736 + 1718721 = 1644^2 + 1311^2 .

It is not a de Polignac number, because 4421457 - 2³ = 4421449 is a prime.

4421457 is a lucky number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 4421457.

It is not an unprimeable number, because it can be changed into a prime (4421407) 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, 245628 + ... + 245645.

It is an arithmetic number, because the mean of its divisors is an integer number (1064427).

Almost surely, 2^4421457 is an apocalyptic number.

It is an amenable number.

4421457 is a deficient number, since it is larger than the sum of its proper divisors (1965105).

4421457 is a wasteful number, since it uses less digits than its factorization.

4421457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491279 (or 491276 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 4421457 is about 2102.7260877252. The cubic root of 4421457 is about 164.1301886135.

The spelling of 4421457 in words is "four million, four hundred twenty-one thousand, four hundred fifty-seven".