981200745 has 72 divisors (see below), whose sum is σ = 1985387976. Its totient is φ = 446971392.

The previous prime is 981200719. The next prime is 981200767. The reversal of 981200745 is 547002189.

It can be written as a sum of positive squares in 4 ways, for example, as 115605504 + 865595241 = 10752^2 + 29421^2 .

It is not a de Polignac number, because 981200745 - 2¹⁰ = 981199721 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 821869 + ... + 823061.

It is an arithmetic number, because the mean of its divisors is an integer number (27574833).

Almost surely, 2^981200745 is an apocalyptic number.

It is an amenable number.

981200745 is an abundant number, since it is smaller than the sum of its proper divisors (1004187231).

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

981200745 is a wasteful number, since it uses less digits than its factorization.

981200745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 981200745 is about 31324.1240100980. The cubic root of 981200745 is about 993.6938983399.

The spelling of 981200745 in words is "nine hundred eighty-one million, two hundred thousand, seven hundred forty-five".