1243201455 has 24 divisors (see below), whose sum is σ = 2159893008. Its totient is φ = 661499136.

The previous prime is 1243201447. The next prime is 1243201459. The reversal of 1243201455 is 5541023421.

1243201455 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 201 + 455 = 666.

It is not a de Polignac number, because 1243201455 - 2³ = 1243201447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243201459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12417 + ... + 51386.

It is an arithmetic number, because the mean of its divisors is an integer number (89995542).

Almost surely, 2^1243201455 is an apocalyptic number.

1243201455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1243201455 is a deficient number, since it is larger than the sum of its proper divisors (916691553).

1243201455 is a wasteful number, since it uses less digits than its factorization.

1243201455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64247 (or 64244 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 1243201455 is about 35259.0620266620. The cubic root of 1243201455 is about 1075.2608575538.

Adding to 1243201455 its reverse (5541023421), we get a palindrome (6784224876).

The spelling of 1243201455 in words is "one billion, two hundred forty-three million, two hundred one thousand, four hundred fifty-five".