2142001405 has 16 divisors (see below), whose sum is σ = 2614636080. Its totient is φ = 1684274688.

The previous prime is 2142001391. The next prime is 2142001409. The reversal of 2142001405 is 5041002412.

It can be written as a sum of positive squares in 8 ways, for example, as 27657081 + 2114344324 = 5259^2 + 45982^2 .

It is not a de Polignac number, because 2142001405 - 2¹¹ = 2141999357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142001409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96931 + ... + 116959.

It is an arithmetic number, because the mean of its divisors is an integer number (163414755).

Almost surely, 2^2142001405 is an apocalyptic number.

It is an amenable number.

2142001405 is a deficient number, since it is larger than the sum of its proper divisors (472634675).

2142001405 is a wasteful number, since it uses less digits than its factorization.

2142001405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20400.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2142001405 is about 46281.7610403926. The cubic root of 2142001405 is about 1289.0603507099.

Adding to 2142001405 its reverse (5041002412), we get a palindrome (7183003817).

The spelling of 2142001405 in words is "two billion, one hundred forty-two million, one thousand, four hundred five".