2705726421 has 12 divisors (see below), whose sum is σ = 3915956460. Its totient is φ = 1800270720.

The previous prime is 2705726411. The next prime is 2705726449. The reversal of 2705726421 is 1246275072.

It is a happy number.

2705726421 is a `hidden beast` number, since 2 + 7 + 0 + 5 + 7 + 2 + 642 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1553463396 + 1152263025 = 39414^2 + 33945^2 .

It is not a de Polignac number, because 2705726421 - 2⁶ = 2705726357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2705726411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290740 + ... + 299901.

It is an arithmetic number, because the mean of its divisors is an integer number (326329705).

Almost surely, 2^2705726421 is an apocalyptic number.

It is an amenable number.

2705726421 is a deficient number, since it is larger than the sum of its proper divisors (1210230039).

2705726421 is a wasteful number, since it uses less digits than its factorization.

2705726421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591156 (or 591153 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 2705726421 is about 52016.5975530888. The cubic root of 2705726421 is about 1393.4603879710.

The spelling of 2705726421 in words is "two billion, seven hundred five million, seven hundred twenty-six thousand, four hundred twenty-one".