2145420545 has 8 divisors (see below), whose sum is σ = 2585278080. Its totient is φ = 1709154160.

The previous prime is 2145420527. The next prime is 2145420559. The reversal of 2145420545 is 5450245412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2145420545 - 2¹⁸ = 2145158401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896471 + ... + 898860.

It is an arithmetic number, because the mean of its divisors is an integer number (323159760).

Almost surely, 2^2145420545 is an apocalyptic number.

It is an amenable number.

2145420545 is a deficient number, since it is larger than the sum of its proper divisors (439857535).

2145420545 is a wasteful number, since it uses less digits than its factorization.

2145420545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795575.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2145420545 is about 46318.6846207878. The cubic root of 2145420545 is about 1289.7458676520.

Adding to 2145420545 its reverse (5450245412), we get a palindrome (7595665957).

The spelling of 2145420545 in words is "two billion, one hundred forty-five million, four hundred twenty thousand, five hundred forty-five".