1200231538 has 16 divisors (see below), whose sum is σ = 1965549600. Its totient is φ = 545133600.

The previous prime is 1200231533. The next prime is 1200231541. The reversal of 1200231538 is 8351320021.

It is not an unprimeable number, because it can be changed into a prime (1200231533) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8413 + ... + 49711.

It is an arithmetic number, because the mean of its divisors is an integer number (122846850).

Almost surely, 2^1200231538 is an apocalyptic number.

1200231538 is a deficient number, since it is larger than the sum of its proper divisors (765318062).

1200231538 is a wasteful number, since it uses less digits than its factorization.

1200231538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42633.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1200231538 is about 34644.3579533522. The cubic root of 1200231538 is about 1062.7269108539.

Adding to 1200231538 its reverse (8351320021), we get a palindrome (9551551559).

The spelling of 1200231538 in words is "one billion, two hundred million, two hundred thirty-one thousand, five hundred thirty-eight".