2061253405 has 4 divisors (see below), whose sum is σ = 2473504092. Its totient is φ = 1649002720.

The previous prime is 2061253367. The next prime is 2061253421. The reversal of 2061253405 is 5043521602.

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 1557565156 + 503688249 = 39466^2 + 22443^2 .

It is not a de Polignac number, because 2061253405 - 2²³ = 2052864797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206125336 + ... + 206125345.

It is an arithmetic number, because the mean of its divisors is an integer number (618376023).

Almost surely, 2^2061253405 is an apocalyptic number.

It is an amenable number.

2061253405 is a deficient number, since it is larger than the sum of its proper divisors (412250687).

2061253405 is an equidigital number, since it uses as much as digits as its factorization.

2061253405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412250686.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2061253405 is about 45401.0286777734. The cubic root of 2061253405 is about 1272.6543375111.

The spelling of 2061253405 in words is "two billion, sixty-one million, two hundred fifty-three thousand, four hundred five".