1201010985 has 48 divisors (see below), whose sum is σ = 2207761920. Its totient is φ = 601889280.

The previous prime is 1201010983. The next prime is 1201010999. The reversal of 1201010985 is 5890101021.

It is not a de Polignac number, because 1201010985 - 2¹ = 1201010983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201010983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 833896 + ... + 835334.

It is an arithmetic number, because the mean of its divisors is an integer number (45995040).

Almost surely, 2^1201010985 is an apocalyptic number.

1201010985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1201010985 is a deficient number, since it is larger than the sum of its proper divisors (1006750935).

1201010985 is a wasteful number, since it uses less digits than its factorization.

1201010985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1201010985 is about 34655.6053907589. The cubic root of 1201010985 is about 1062.9569109357.

The spelling of 1201010985 in words is "one billion, two hundred one million, ten thousand, nine hundred eighty-five".