1201540120 has 64 divisors (see below), whose sum is σ = 2953117440. Its totient is φ = 436348800.

The previous prime is 1201540091. The next prime is 1201540141. The reversal of 1201540120 is 210451021.

It is a super-2 number, since 2×1201540120² = 2887397319939228800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1201540094 and 1201540103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 478789 + ... + 481291.

It is an arithmetic number, because the mean of its divisors is an integer number (46142460).

Almost surely, 2^1201540120 is an apocalyptic number.

1201540120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201540120 is an abundant number, since it is smaller than the sum of its proper divisors (1751577320).

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

1201540120 is a wasteful number, since it uses less digits than its factorization.

1201540120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616 (or 3612 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1201540120 is about 34663.2387407755. The cubic root of 1201540120 is about 1063.1129919741.

Adding to 1201540120 its reverse (210451021), we get a palindrome (1411991141).

The spelling of 1201540120 in words is "one billion, two hundred one million, five hundred forty thousand, one hundred twenty".