1200242655 has 48 divisors (see below), whose sum is σ = 2174914560. Its totient is φ = 611582400.

The previous prime is 1200242627. The next prime is 1200242657. The reversal of 1200242655 is 5562420021.

1200242655 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 2 + 4 + 2 + 655 = 666.

It is not a de Polignac number, because 1200242655 - 2⁶ = 1200242591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200242657) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104760 + ... + 115650.

It is an arithmetic number, because the mean of its divisors is an integer number (45310720).

Almost surely, 2^1200242655 is an apocalyptic number.

1200242655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200242655 is a deficient number, since it is larger than the sum of its proper divisors (974671905).

1200242655 is a wasteful number, since it uses less digits than its factorization.

1200242655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11012 (or 11009 counting only the distinct ones).

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

The square root of 1200242655 is about 34644.5183975763. The cubic root of 1200242655 is about 1062.7301919705.

Adding to 1200242655 its reverse (5562420021), we get a palindrome (6762662676).

The spelling of 1200242655 in words is "one billion, two hundred million, two hundred forty-two thousand, six hundred fifty-five".