1011155142 has 16 divisors (see below), whose sum is σ = 2022750000. Its totient is φ = 336978432.

The previous prime is 1011155111. The next prime is 1011155251. The reversal of 1011155142 is 2415511101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16734 + ... + 47982.

It is an arithmetic number, because the mean of its divisors is an integer number (126421875).

Almost surely, 2^1011155142 is an apocalyptic number.

1011155142 is an abundant number, since it is smaller than the sum of its proper divisors (1011594858).

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

1011155142 is a wasteful number, since it uses less digits than its factorization.

1011155142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36647.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 1011155142 is about 31798.6657267251. The cubic root of 1011155142 is about 1003.7046393659.

Adding to 1011155142 its reverse (2415511101), we get a palindrome (3426666243).

The spelling of 1011155142 in words is "one billion, eleven million, one hundred fifty-five thousand, one hundred forty-two".