1220955427 has 2 divisors, whose sum is σ = 1220955428. Its totient is φ = 1220955426.

The previous prime is 1220955413. The next prime is 1220955431. The reversal of 1220955427 is 7245590221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220955427 - 2²³ = 1212566819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220955457) 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, 610477713 + 610477714.

It is an arithmetic number, because the mean of its divisors is an integer number (610477714).

Almost surely, 2^1220955427 is an apocalyptic number.

1220955427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220955427 is an equidigital number, since it uses as much as digits as its factorization.

1220955427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1220955427 is about 34942.1726141922. The cubic root of 1220955427 is about 1068.8085923807.

The spelling of 1220955427 in words is "one billion, two hundred twenty million, nine hundred fifty-five thousand, four hundred twenty-seven".