1142551871 has 8 divisors (see below), whose sum is σ = 1220638080. Its totient is φ = 1066260888.

The previous prime is 1142551859. The next prime is 1142551939. The reversal of 1142551871 is 1781552411.

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 1142551871 - 2⁶ = 1142551807 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 (1142551171) 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, 447491 + ... + 450036.

It is an arithmetic number, because the mean of its divisors is an integer number (152579760).

Almost surely, 2^1142551871 is an apocalyptic number.

1142551871 is a deficient number, since it is larger than the sum of its proper divisors (78086209).

1142551871 is an equidigital number, since it uses as much as digits as its factorization.

1142551871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897613.

The product of its digits is 11200, while the sum is 35.

The square root of 1142551871 is about 33801.6548559386. The cubic root of 1142551871 is about 1045.4228186055.

The spelling of 1142551871 in words is "one billion, one hundred forty-two million, five hundred fifty-one thousand, eight hundred seventy-one".