1155217342 has 4 divisors (see below), whose sum is σ = 1732826016. Its totient is φ = 577608670.

The previous prime is 1155217339. The next prime is 1155217373. The reversal of 1155217342 is 2437125511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2437125511 = 36479 ⋅66809.

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 as a sum of consecutive naturals, namely, 288804334 + ... + 288804337.

It is an arithmetic number, because the mean of its divisors is an integer number (433206504).

Almost surely, 2^1155217342 is an apocalyptic number.

1155217342 is a deficient number, since it is larger than the sum of its proper divisors (577608674).

1155217342 is an equidigital number, since it uses as much as digits as its factorization.

1155217342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577608673.

The product of its digits is 8400, while the sum is 31.

The square root of 1155217342 is about 33988.4883747424. The cubic root of 1155217342 is about 1049.2715558274.

The spelling of 1155217342 in words is "one billion, one hundred fifty-five million, two hundred seventeen thousand, three hundred forty-two".