1201855083 has 32 divisors (see below), whose sum is σ = 1918183680. Its totient is φ = 659667840.

The previous prime is 1201855073. The next prime is 1201855111. The reversal of 1201855083 is 3805581021.

It is a happy number.

It is not a de Polignac number, because 1201855083 - 2⁶ = 1201855019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1201855003) 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 31 ways as a sum of consecutive naturals, for example, 3693 + ... + 49166.

It is an arithmetic number, because the mean of its divisors is an integer number (59943240).

Almost surely, 2^1201855083 is an apocalyptic number.

1201855083 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1201855083 is a deficient number, since it is larger than the sum of its proper divisors (716328597).

1201855083 is a wasteful number, since it uses less digits than its factorization.

1201855083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52939.

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 1201855083 is about 34667.7816279035. The cubic root of 1201855083 is about 1063.2058760980.

The spelling of 1201855083 in words is "one billion, two hundred one million, eight hundred fifty-five thousand, eighty-three".