1201785812 has 12 divisors (see below), whose sum is σ = 2142807156. Its totient is φ = 589555200.

The previous prime is 1201785791. The next prime is 1201785833. The reversal of 1201785812 is 2185871021.

It is an interprime number because it is at equal distance from previous prime (1201785791) and next prime (1201785833).

It can be written as a sum of positive squares in 2 ways, for example, as 395452996 + 806332816 = 19886^2 + 28396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2834189 + ... + 2834612.

It is an arithmetic number, because the mean of its divisors is an integer number (178567263).

Almost surely, 2^1201785812 is an apocalyptic number.

It is an amenable number.

1201785812 is a deficient number, since it is larger than the sum of its proper divisors (941021344).

1201785812 is a wasteful number, since it uses less digits than its factorization.

1201785812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5668858 (or 5668856 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 1201785812 is about 34666.7825446781. The cubic root of 1201785812 is about 1063.1854491346.

The spelling of 1201785812 in words is "one billion, two hundred one million, seven hundred eighty-five thousand, eight hundred twelve".