2145450123 has 12 divisors (see below), whose sum is σ = 3157455600. Its totient is φ = 1403312976.

The previous prime is 2145450107. The next prime is 2145450149. The reversal of 2145450123 is 3210545412.

It is not a de Polignac number, because 2145450123 - 2⁴ = 2145450107 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2145450103) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2248423 + ... + 2249376.

It is an arithmetic number, because the mean of its divisors is an integer number (263121300).

Almost surely, 2^2145450123 is an apocalyptic number.

2145450123 is a deficient number, since it is larger than the sum of its proper divisors (1012005477).

2145450123 is a wasteful number, since it uses less digits than its factorization.

2145450123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4497858 (or 4497855 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2145450123 is about 46319.0039076835. The cubic root of 2145450123 is about 1289.7517946839.

Adding to 2145450123 its reverse (3210545412), we get a palindrome (5355995535).

The spelling of 2145450123 in words is "two billion, one hundred forty-five million, four hundred fifty thousand, one hundred twenty-three".