1155122142 has 16 divisors (see below), whose sum is σ = 2389908240. Its totient is φ = 371763392.

The previous prime is 1155122141. The next prime is 1155122183. The reversal of 1155122142 is 2412215511.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155122141) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3319143 + ... + 3319490.

It is an arithmetic number, because the mean of its divisors is an integer number (149369265).

Almost surely, 2^1155122142 is an apocalyptic number.

1155122142 is an abundant number, since it is smaller than the sum of its proper divisors (1234786098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155122142 is a wasteful number, since it uses less digits than its factorization.

1155122142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6638667.

The product of its digits is 800, while the sum is 24.

The square root of 1155122142 is about 33987.0878717198. The cubic root of 1155122142 is about 1049.2427319884.

Adding to 1155122142 its reverse (2412215511), we get a palindrome (3567337653).

The spelling of 1155122142 in words is "one billion, one hundred fifty-five million, one hundred twenty-two thousand, one hundred forty-two".