2445142921 has 16 divisors (see below), whose sum is σ = 2671631424. Its totient is φ = 2224361664.

The previous prime is 2445142913. The next prime is 2445142933. The reversal of 2445142921 is 1292415442.

It is a cyclic number.

It is not a de Polignac number, because 2445142921 - 2³ = 2445142913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2445142621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269566 + ... + 278488.

It is an arithmetic number, because the mean of its divisors is an integer number (166976964).

Almost surely, 2^2445142921 is an apocalyptic number.

It is an amenable number.

2445142921 is a deficient number, since it is larger than the sum of its proper divisors (226488503).

2445142921 is a wasteful number, since it uses less digits than its factorization.

2445142921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9240.

The product of its digits is 23040, while the sum is 34.

The square root of 2445142921 is about 49448.3864347463. The cubic root of 2445142921 is about 1347.2082997194.

The spelling of 2445142921 in words is "two billion, four hundred forty-five million, one hundred forty-two thousand, nine hundred twenty-one".