1205312124 has 12 divisors (see below), whose sum is σ = 2812394984. Its totient is φ = 401770704.

The previous prime is 1205312113. The next prime is 1205312149. The reversal of 1205312124 is 4212135021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1205312124² = 2905554632522782752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1205312124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50221327 + ... + 50221350.

Almost surely, 2^1205312124 is an apocalyptic number.

It is an amenable number.

1205312124 is an abundant number, since it is smaller than the sum of its proper divisors (1607082860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205312124 is a wasteful number, since it uses less digits than its factorization.

1205312124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100442684 (or 100442682 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1205312124 is about 34717.6053897731. The cubic root of 1205312124 is about 1064.2243094179.

Adding to 1205312124 its reverse (4212135021), we get a palindrome (5417447145).

The spelling of 1205312124 in words is "one billion, two hundred five million, three hundred twelve thousand, one hundred twenty-four".