1201540000 has 60 divisors (see below), whose sum is σ = 2956017834. Its totient is φ = 480608000.

The previous prime is 1201539949. The next prime is 1201540001. The reversal of 1201540000 is 451021.

It can be written as a sum of positive squares in 5 ways, for example, as 3549456 + 1197990544 = 1884^2 + 34612^2 .

It is not an unprimeable number, because it can be changed into a prime (1201540001) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 10039 + ... + 50038.

Almost surely, 2^1201540000 is an apocalyptic number.

1201540000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201540000 is an abundant number, since it is smaller than the sum of its proper divisors (1754477834).

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

1201540000 is an frugal number, since it uses more digits than its factorization.

1201540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60107 (or 60084 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1201540000 is about 34663.2370098351. The cubic root of 1201540000 is about 1063.1129565824.

Adding to 1201540000 its reverse (451021), we get a palindrome (1201991021).

The spelling of 1201540000 in words is "one billion, two hundred one million, five hundred forty thousand".