2142721437 has 8 divisors (see below), whose sum is σ = 2857240320. Its totient is φ = 1428341760.

The previous prime is 2142721421. The next prime is 2142721501. The reversal of 2142721437 is 7341272412.

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

It is not a de Polignac number, because 2142721437 - 2⁴ = 2142721421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2142721398 and 2142721407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142721417) 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, 8989 + ... + 66077.

It is an arithmetic number, because the mean of its divisors is an integer number (357155040).

Almost surely, 2^2142721437 is an apocalyptic number.

It is an amenable number.

2142721437 is a deficient number, since it is larger than the sum of its proper divisors (714518883).

2142721437 is a wasteful number, since it uses less digits than its factorization.

2142721437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69603.

The product of its digits is 18816, while the sum is 33.

The square root of 2142721437 is about 46289.5391746343. The cubic root of 2142721437 is about 1289.2047733853.

Adding to 2142721437 its reverse (7341272412), we get a palindrome (9483993849).

The spelling of 2142721437 in words is "two billion, one hundred forty-two million, seven hundred twenty-one thousand, four hundred thirty-seven".