123220995 has 16 divisors (see below), whose sum is σ = 197517312. Its totient is φ = 65596640.

The previous prime is 123220967. The next prime is 123221009. The reversal of 123220995 is 599022321.

It is not a de Polignac number, because 123220995 - 2⁶ = 123220931 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1150 + ... + 15740.

It is an arithmetic number, because the mean of its divisors is an integer number (12344832).

Almost surely, 2^123220995 is an apocalyptic number.

123220995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123220995 is a deficient number, since it is larger than the sum of its proper divisors (74296317).

123220995 is a wasteful number, since it uses less digits than its factorization.

123220995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15162.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 123220995 is about 11100.4952592215. The cubic root of 123220995 is about 497.6166506764.

The spelling of 123220995 in words is "one hundred twenty-three million, two hundred twenty thousand, nine hundred ninety-five".