1201906940 has 48 divisors (see below), whose sum is σ = 2861231520. Its totient is φ = 420422400.

The previous prime is 1201906939. The next prime is 1201906949. The reversal of 1201906940 is 496091021.

It is a junction number, because it is equal to n+sod(n) for n = 1201906897 and 1201906906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201906949) 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 15 ways as a sum of consecutive naturals, for example, 116711 + ... + 126590.

It is an arithmetic number, because the mean of its divisors is an integer number (59608990).

Almost surely, 2^1201906940 is an apocalyptic number.

1201906940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201906940 is an abundant number, since it is smaller than the sum of its proper divisors (1659324580).

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

1201906940 is a wasteful number, since it uses less digits than its factorization.

1201906940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243342 (or 243340 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1201906940 is about 34668.5295332813. The cubic root of 1201906940 is about 1063.2211674241.

Adding to 1201906940 its reverse (496091021), we get a palindrome (1697997961).

The spelling of 1201906940 in words is "one billion, two hundred one million, nine hundred six thousand, nine hundred forty".