2125404005 has 16 divisors (see below), whose sum is σ = 2724423984. Its totient is φ = 1586135040.

The previous prime is 2125403993. The next prime is 2125404019. The reversal of 2125404005 is 5004045212.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 497200804 + 1628203201 = 22298^2 + 40351^2 .

It is not a de Polignac number, because 2125404005 - 2¹² = 2125399909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101036 + ... + 120245.

It is an arithmetic number, because the mean of its divisors is an integer number (170276499).

Almost surely, 2^2125404005 is an apocalyptic number.

It is an amenable number.

2125404005 is a deficient number, since it is larger than the sum of its proper divisors (599019979).

2125404005 is a wasteful number, since it uses less digits than its factorization.

2125404005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221416.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2125404005 is about 46102.1041276860. The cubic root of 2125404005 is about 1285.7222655090.

Adding to 2125404005 its reverse (5004045212), we get a palindrome (7129449217).

The spelling of 2125404005 in words is "two billion, one hundred twenty-five million, four hundred four thousand, five".