1200001248 has 36 divisors (see below), whose sum is σ = 3412504368. Its totient is φ = 400000320.

The previous prime is 1200001247. The next prime is 1200001267. The reversal of 1200001248 is 8421000021.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 1200001248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200001247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2083048 + ... + 2083623.

It is an arithmetic number, because the mean of its divisors is an integer number (94791788).

Almost surely, 2^1200001248 is an apocalyptic number.

1200001248 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1200001248 is an abundant number, since it is smaller than the sum of its proper divisors (2212503120).

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

1200001248 is a wasteful number, since it uses less digits than its factorization.

1200001248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166687 (or 4166676 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1200001248 is about 34641.0341647013. The cubic root of 1200001248 is about 1062.6589375708.

Adding to 1200001248 its reverse (8421000021), we get a palindrome (9621001269).

The spelling of 1200001248 in words is "one billion, two hundred million, one thousand, two hundred forty-eight".