1223012987 has 12 divisors (see below), whose sum is σ = 1408618608. Its totient is φ = 1040192400.

The previous prime is 1223012981. The next prime is 1223013037. The reversal of 1223012987 is 7892103221.

It is not a de Polignac number, because 1223012987 - 2⁸ = 1223012731 is a prime.

It is a Duffinian number.

1223012987 is a modest number, since divided by 12987 gives 1223 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1223012981) 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 in 11 ways as a sum of consecutive naturals, for example, 115037 + ... + 125217.

It is an arithmetic number, because the mean of its divisors is an integer number (117384884).

Almost surely, 2^1223012987 is an apocalyptic number.

1223012987 is a deficient number, since it is larger than the sum of its proper divisors (185605621).

1223012987 is an equidigital number, since it uses as much as digits as its factorization.

1223012987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10450 (or 10319 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1223012987 is about 34971.6025798075. The cubic root of 1223012987 is about 1069.4086425767.

The spelling of 1223012987 in words is "one billion, two hundred twenty-three million, twelve thousand, nine hundred eighty-seven".