1220341995 has 24 divisors (see below), whose sum is σ = 2117187072. Its totient is φ = 650256000.

The previous prime is 1220341973. The next prime is 1220342009. The reversal of 1220341995 is 5991430221.

1220341995 is a `hidden beast` number, since 1 + 220 + 341 + 9 + 95 = 666.

It is not a de Polignac number, because 1220341995 - 2⁵ = 1220341963 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 40015 + ... + 63575.

It is an arithmetic number, because the mean of its divisors is an integer number (88216128).

Almost surely, 2^1220341995 is an apocalyptic number.

1220341995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220341995 is a deficient number, since it is larger than the sum of its proper divisors (896845077).

1220341995 is a wasteful number, since it uses less digits than its factorization.

1220341995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24723 (or 24720 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 1220341995 is about 34933.3936942863. The cubic root of 1220341995 is about 1068.6295655817.

The spelling of 1220341995 in words is "one billion, two hundred twenty million, three hundred forty-one thousand, nine hundred ninety-five".