2142021445 has 8 divisors (see below), whose sum is σ = 2579982840. Its totient is φ = 1707245760.

The previous prime is 2142021443. The next prime is 2142021451. The reversal of 2142021445 is 5441202412.

It can be written as a sum of positive squares in 4 ways, for example, as 21511044 + 2120510401 = 4638^2 + 46049^2 .

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

It is not a de Polignac number, because 2142021445 - 2¹ = 2142021443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142021443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 794946 + ... + 797635.

It is an arithmetic number, because the mean of its divisors is an integer number (322497855).

Almost surely, 2^2142021445 is an apocalyptic number.

It is an amenable number.

2142021445 is a deficient number, since it is larger than the sum of its proper divisors (437961395).

2142021445 is a wasteful number, since it uses less digits than its factorization.

2142021445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592855.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 2142021445 is about 46281.9775398589. The cubic root of 2142021445 is about 1289.0643707335.

Adding to 2142021445 its reverse (5441202412), we get a palindrome (7583223857).

The spelling of 2142021445 in words is "two billion, one hundred forty-two million, twenty-one thousand, four hundred forty-five".