2143742405 has 24 divisors (see below), whose sum is σ = 3034661760. Its totient is φ = 1449278880.

The previous prime is 2143742401. The next prime is 2143742407. The reversal of 2143742405 is 5042473412.

It is not a de Polignac number, because 2143742405 - 2² = 2143742401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143742401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44225 + ... + 79014.

It is an arithmetic number, because the mean of its divisors is an integer number (126444240).

Almost surely, 2^2143742405 is an apocalyptic number.

It is an amenable number.

2143742405 is a deficient number, since it is larger than the sum of its proper divisors (890919355).

2143742405 is a wasteful number, since it uses less digits than its factorization.

2143742405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123329 (or 123322 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 2143742405 is about 46300.5659252670. The cubic root of 2143742405 is about 1289.4095017893.

The spelling of 2143742405 in words is "two billion, one hundred forty-three million, seven hundred forty-two thousand, four hundred five".