2126400847 has 4 divisors (see below), whose sum is σ = 2127056976. Its totient is φ = 2125744720.

The previous prime is 2126400839. The next prime is 2126400877. The reversal of 2126400847 is 7480046212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2126400847 - 2³ = 2126400839 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 (2126400877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323179 + ... + 329692.

It is an arithmetic number, because the mean of its divisors is an integer number (531764244).

Almost surely, 2^2126400847 is an apocalyptic number.

2126400847 is a deficient number, since it is larger than the sum of its proper divisors (656129).

2126400847 is an equidigital number, since it uses as much as digits as its factorization.

2126400847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656128.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 2126400847 is about 46112.9141022339. The cubic root of 2126400847 is about 1285.9232408893.

The spelling of 2126400847 in words is "two billion, one hundred twenty-six million, four hundred thousand, eight hundred forty-seven".