1201333540 has 24 divisors (see below), whose sum is σ = 2752146432. Its totient is φ = 436848480.

The previous prime is 1201333499. The next prime is 1201333589. The reversal of 1201333540 is 453331021.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2730084 + ... + 2730523.

It is an arithmetic number, because the mean of its divisors is an integer number (114672768).

Almost surely, 2^1201333540 is an apocalyptic number.

1201333540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201333540 is an abundant number, since it is smaller than the sum of its proper divisors (1550812892).

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

1201333540 is a wasteful number, since it uses less digits than its factorization.

1201333540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5460627 (or 5460625 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1201333540 is about 34660.2587988030. The cubic root of 1201333540 is about 1063.0520617103.

Adding to 1201333540 its reverse (453331021), we get a palindrome (1654664561).

The spelling of 1201333540 in words is "one billion, two hundred one million, three hundred thirty-three thousand, five hundred forty".