1138212045 has 24 divisors (see below), whose sum is σ = 1974450816. Its totient is φ = 606569568.

The previous prime is 1138212037. The next prime is 1138212071. The reversal of 1138212045 is 5402128311.

It is not a de Polignac number, because 1138212045 - 2³ = 1138212037 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 52264 + ... + 70766.

It is an arithmetic number, because the mean of its divisors is an integer number (82268784).

Almost surely, 2^1138212045 is an apocalyptic number.

1138212045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1138212045 is a deficient number, since it is larger than the sum of its proper divisors (836238771).

1138212045 is a wasteful number, since it uses less digits than its factorization.

1138212045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19881 (or 19878 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1138212045 is about 33737.3983140372. The cubic root of 1138212045 is about 1044.0975076276.

The spelling of 1138212045 in words is "one billion, one hundred thirty-eight million, two hundred twelve thousand, forty-five".