1142020005 has 32 divisors (see below), whose sum is σ = 2155634688. Its totient is φ = 505224000.

The previous prime is 1142020003. The next prime is 1142020051. The reversal of 1142020005 is 5000202411.

It is not a de Polignac number, because 1142020005 - 2¹ = 1142020003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142020001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 172171 + ... + 178680.

It is an arithmetic number, because the mean of its divisors is an integer number (67363584).

Almost surely, 2^1142020005 is an apocalyptic number.

1142020005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1142020005 is a deficient number, since it is larger than the sum of its proper divisors (1013614683).

1142020005 is a wasteful number, since it uses less digits than its factorization.

1142020005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350897.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1142020005 is about 33793.7864850922. The cubic root of 1142020005 is about 1045.2605761822.

Adding to 1142020005 its reverse (5000202411), we get a palindrome (6142222416).

The spelling of 1142020005 in words is "one billion, one hundred forty-two million, twenty thousand, five".