1200864520 has 32 divisors (see below), whose sum is σ = 2706451200. Its totient is φ = 479544768.

The previous prime is 1200864499. The next prime is 1200864529. The reversal of 1200864520 is 254680021.

It is not an unprimeable number, because it can be changed into a prime (1200864529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450 + ... + 49009.

It is an arithmetic number, because the mean of its divisors is an integer number (84576600).

Almost surely, 2^1200864520 is an apocalyptic number.

1200864520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200864520 is an abundant number, since it is smaller than the sum of its proper divisors (1505586680).

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

1200864520 is a wasteful number, since it uses less digits than its factorization.

1200864520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50077 (or 50073 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1200864520 is about 34653.4921761141. The cubic root of 1200864520 is about 1062.9136994760.

The spelling of 1200864520 in words is "one billion, two hundred million, eight hundred sixty-four thousand, five hundred twenty".