1220225947 has 2 divisors, whose sum is σ = 1220225948. Its totient is φ = 1220225946.

The previous prime is 1220225939. The next prime is 1220225989. The reversal of 1220225947 is 7495220221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220225947 - 2³ = 1220225939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220229947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610112973 + 610112974.

It is an arithmetic number, because the mean of its divisors is an integer number (610112974).

Almost surely, 2^1220225947 is an apocalyptic number.

1220225947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220225947 is an equidigital number, since it uses as much as digits as its factorization.

1220225947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 1220225947 is about 34931.7326653002. The cubic root of 1220225947 is about 1068.5956908549.

The spelling of 1220225947 in words is "one billion, two hundred twenty million, two hundred twenty-five thousand, nine hundred forty-seven".