1200891753 has 6 divisors (see below), whose sum is σ = 1734621434. Its totient is φ = 800594496.

The previous prime is 1200891739. The next prime is 1200891761. The reversal of 1200891753 is 3571980021.

It can be written as a sum of positive squares in only one way, i.e., 1192528089 + 8363664 = 34533^2 + 2892^2 .

It is not a de Polignac number, because 1200891753 - 2¹² = 1200887657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200891053) 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, 66716200 + ... + 66716217.

Almost surely, 2^1200891753 is an apocalyptic number.

It is an amenable number.

1200891753 is a deficient number, since it is larger than the sum of its proper divisors (533729681).

1200891753 is a wasteful number, since it uses less digits than its factorization.

1200891753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133432423 (or 133432420 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1200891753 is about 34653.8851068679. The cubic root of 1200891753 is about 1062.9217342736.

The spelling of 1200891753 in words is "one billion, two hundred million, eight hundred ninety-one thousand, seven hundred fifty-three".