1020142555 has 8 divisors (see below), whose sum is σ = 1241413344. Its totient is φ = 804619200.

The previous prime is 1020142553. The next prime is 1020142583. The reversal of 1020142555 is 5552410201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020142555 - 2¹ = 1020142553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020142553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436466 + ... + 1437175.

It is an arithmetic number, because the mean of its divisors is an integer number (155176668).

Almost surely, 2^1020142555 is an apocalyptic number.

1020142555 is a deficient number, since it is larger than the sum of its proper divisors (221270789).

1020142555 is an equidigital number, since it uses as much as digits as its factorization.

1020142555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873717.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1020142555 is about 31939.6705524650. The cubic root of 1020142555 is about 1006.6696025064.

Adding to 1020142555 its reverse (5552410201), we get a palindrome (6572552756).

The spelling of 1020142555 in words is "one billion, twenty million, one hundred forty-two thousand, five hundred fifty-five".