2705428251421 has 8 divisors (see below), whose sum is σ = 3093652125824. Its totient is φ = 2317637908080.

The previous prime is 2705428251413. The next prime is 2705428251521. The reversal of 2705428251421 is 1241528245072.

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

It is a cyclic number.

It is not a de Polignac number, because 2705428251421 - 2³ = 2705428251413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2705428251401) 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, 108369390 + ... + 108394351.

It is an arithmetic number, because the mean of its divisors is an integer number (386706515728).

Almost surely, 2^{2705428251421} is an apocalyptic number.

It is an amenable number.

2705428251421 is a deficient number, since it is larger than the sum of its proper divisors (388223874403).

2705428251421 is a wasteful number, since it uses less digits than its factorization.

2705428251421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216765531.

The product of its (nonzero) digits is 358400, while the sum is 43.

The spelling of 2705428251421 in words is "two trillion, seven hundred five billion, four hundred twenty-eight million, two hundred fifty-one thousand, four hundred twenty-one".