1220437249 has 2 divisors, whose sum is σ = 1220437250. Its totient is φ = 1220437248.

The previous prime is 1220437213. The next prime is 1220437291. The reversal of 1220437249 is 9427340221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 621754225 + 598683024 = 24935^2 + 24468^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220437249 - 2¹³ = 1220429057 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220437649) 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, 610218624 + 610218625.

It is an arithmetic number, because the mean of its divisors is an integer number (610218625).

Almost surely, 2^1220437249 is an apocalyptic number.

It is an amenable number.

1220437249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220437249 is an equidigital number, since it uses as much as digits as its factorization.

1220437249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1220437249 is about 34934.7570336477. The cubic root of 1220437249 is about 1068.6573688785.

The spelling of 1220437249 in words is "one billion, two hundred twenty million, four hundred thirty-seven thousand, two hundred forty-nine".