1201144420 has 48 divisors (see below), whose sum is σ = 2931626880. Its totient is φ = 404838144.

The previous prime is 1201144393. The next prime is 1201144421. The reversal of 1201144420 is 244411021.

It is not an unprimeable number, because it can be changed into a prime (1201144421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64449 + ... + 80968.

It is an arithmetic number, because the mean of its divisors is an integer number (61075560).

Almost surely, 2^1201144420 is an apocalyptic number.

1201144420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201144420 is an abundant number, since it is smaller than the sum of its proper divisors (1730482460).

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

1201144420 is a wasteful number, since it uses less digits than its factorization.

1201144420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145492 (or 145490 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1201144420 is about 34657.5304948290. The cubic root of 1201144420 is about 1062.9962751060.

Adding to 1201144420 its reverse (244411021), we get a palindrome (1445555441).

The spelling of 1201144420 in words is "one billion, two hundred one million, one hundred forty-four thousand, four hundred twenty".