1138915742 has 4 divisors (see below), whose sum is σ = 1708373616. Its totient is φ = 569457870.

The previous prime is 1138915733. The next prime is 1138915751. The reversal of 1138915742 is 2475198311.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1138915733) and next prime (1138915751).

It is a self number, because there is not a number n which added to its sum of digits gives 1138915742.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284728934 + ... + 284728937.

It is an arithmetic number, because the mean of its divisors is an integer number (427093404).

Almost surely, 2^1138915742 is an apocalyptic number.

1138915742 is a deficient number, since it is larger than the sum of its proper divisors (569457874).

1138915742 is an equidigital number, since it uses as much as digits as its factorization.

1138915742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569457873.

The product of its digits is 60480, while the sum is 41.

The square root of 1138915742 is about 33747.8257373716. The cubic root of 1138915742 is about 1044.3126336007.

The spelling of 1138915742 in words is "one billion, one hundred thirty-eight million, nine hundred fifteen thousand, seven hundred forty-two".