1138342021 has 8 divisors (see below), whose sum is σ = 1171722240. Its totient is φ = 1105343568.

The previous prime is 1138342001. The next prime is 1138342031. The reversal of 1138342021 is 1202438311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1138342021 - 2¹¹ = 1138339973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138342001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89386 + ... + 101323.

It is an arithmetic number, because the mean of its divisors is an integer number (146465280).

Almost surely, 2^1138342021 is an apocalyptic number.

It is an amenable number.

1138342021 is a deficient number, since it is larger than the sum of its proper divisors (33380219).

1138342021 is a wasteful number, since it uses less digits than its factorization.

1138342021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190883.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1138342021 is about 33739.3245486628. The cubic root of 1138342021 is about 1044.1372490369.

The spelling of 1138342021 in words is "one billion, one hundred thirty-eight million, three hundred forty-two thousand, twenty-one".