2142430729 has 4 divisors (see below), whose sum is σ = 2268456084. Its totient is φ = 2016405376.

The previous prime is 2142430727. The next prime is 2142430757. The reversal of 2142430729 is 9270342412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1593606400 + 548824329 = 39920^2 + 23427^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142430729 - 2¹ = 2142430727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2142430694 and 2142430703.

It is not an unprimeable number, because it can be changed into a prime (2142430727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63012652 + ... + 63012685.

It is an arithmetic number, because the mean of its divisors is an integer number (567114021).

Almost surely, 2^2142430729 is an apocalyptic number.

It is an amenable number.

2142430729 is a deficient number, since it is larger than the sum of its proper divisors (126025355).

2142430729 is a wasteful number, since it uses less digits than its factorization.

2142430729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126025354.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 2142430729 is about 46286.3989634104. The cubic root of 2142430729 is about 1289.1464676119.

The spelling of 2142430729 in words is "two billion, one hundred forty-two million, four hundred thirty thousand, seven hundred twenty-nine".