545021249 has 2 divisors, whose sum is σ = 545021250. Its totient is φ = 545021248.

The previous prime is 545021233. The next prime is 545021339. The reversal of 545021249 is 942120545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504316849 + 40704400 = 22457^2 + 6380^2 .

It is a cyclic number.

It is not a de Polignac number, because 545021249 - 2⁴ = 545021233 is a prime.

It is not a weakly prime, because it can be changed into another prime (545021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272510624 + 272510625.

It is an arithmetic number, because the mean of its divisors is an integer number (272510625).

Almost surely, 2^545021249 is an apocalyptic number.

It is an amenable number.

545021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

545021249 is an equidigital number, since it uses as much as digits as its factorization.

545021249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 545021249 is about 23345.6901589994. The cubic root of 545021249 is about 816.8415326968.

The spelling of 545021249 in words is "five hundred forty-five million, twenty-one thousand, two hundred forty-nine".