2145322042 has 4 divisors (see below), whose sum is σ = 3217983066. Its totient is φ = 1072661020.

The previous prime is 2145322037. The next prime is 2145322043. The reversal of 2145322042 is 2402235412.

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

It can be written as a sum of positive squares in only one way, i.e., 1681738081 + 463583961 = 41009^2 + 21531^2 .

It is a super-3 number, since 3×2145322042³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145321998 and 2145322016.

It is not an unprimeable number, because it can be changed into a prime (2145322043) 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 as a sum of consecutive naturals, namely, 536330509 + ... + 536330512.

Almost surely, 2^2145322042 is an apocalyptic number.

2145322042 is a deficient number, since it is larger than the sum of its proper divisors (1072661024).

2145322042 is a wasteful number, since it uses less digits than its factorization.

2145322042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072661023.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2145322042 is about 46317.6212903901. The cubic root of 2145322042 is about 1289.7261285878.

Adding to 2145322042 its reverse (2402235412), we get a palindrome (4547557454).

The spelling of 2145322042 in words is "two billion, one hundred forty-five million, three hundred twenty-two thousand, forty-two".