1223642505 has 16 divisors (see below), whose sum is σ = 1958696064. Its totient is φ = 652320000.

The previous prime is 1223642491. The next prime is 1223642549. The reversal of 1223642505 is 5052463221.

1223642505 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1223642505 - 2¹⁰ = 1223641481 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19380 + ... + 53130.

It is an arithmetic number, because the mean of its divisors is an integer number (122418504).

Almost surely, 2^1223642505 is an apocalyptic number.

1223642505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223642505 is a deficient number, since it is larger than the sum of its proper divisors (735053559).

1223642505 is a wasteful number, since it uses less digits than its factorization.

1223642505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36176.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1223642505 is about 34980.6018387334. The cubic root of 1223642505 is about 1069.5920956616.

The spelling of 1223642505 in words is "one billion, two hundred twenty-three million, six hundred forty-two thousand, five hundred five".