4021497 has 12 divisors (see below), whose sum is σ = 5889364. Its totient is φ = 2643840.

The previous prime is 4021477. The next prime is 4021513. The reversal of 4021497 is 7941204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1279161 + 2742336 = 1131^2 + 1656^2 .

It is not a de Polignac number, because 4021497 - 2¹⁹ = 3497209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4021497.

It is not an unprimeable number, because it can be changed into a prime (4021417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2404 + ... + 3717.

Almost surely, 2^4021497 is an apocalyptic number.

It is an amenable number.

4021497 is a deficient number, since it is larger than the sum of its proper divisors (1867867).

4021497 is a wasteful number, since it uses less digits than its factorization.

4021497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200 (or 6197 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 4021497 is about 2005.3670486971. The cubic root of 4021497 is about 159.0239669579.

The spelling of 4021497 in words is "four million, twenty-one thousand, four hundred ninety-seven".