43021249 has 2 divisors, whose sum is σ = 43021250. Its totient is φ = 43021248.

The previous prime is 43021229. The next prime is 43021261. The reversal of 43021249 is 94212034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38526849 + 4494400 = 6207^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 43021249 - 2¹³ = 43013057 is a prime.

It is not a weakly prime, because it can be changed into another prime (43021219) 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 as a sum of consecutive naturals, namely, 21510624 + 21510625.

It is an arithmetic number, because the mean of its divisors is an integer number (21510625).

Almost surely, 2^43021249 is an apocalyptic number.

It is an amenable number.

43021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

43021249 is an equidigital number, since it uses as much as digits as its factorization.

43021249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 43021249 is about 6559.0585452487. The cubic root of 43021249 is about 350.3975048343.

The spelling of 43021249 in words is "forty-three million, twenty-one thousand, two hundred forty-nine".