2145205042 has 8 divisors (see below), whose sum is σ = 3227530032. Its totient is φ = 1069361700.

The previous prime is 2145205039. The next prime is 2145205043. The reversal of 2145205042 is 2405025412.

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

It is a junction number, because it is equal to n+sod(n) for n = 2145204998 and 2145205016.

It is not an unprimeable number, because it can be changed into a prime (2145205043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1619584 + ... + 1620907.

It is an arithmetic number, because the mean of its divisors is an integer number (403441254).

Almost surely, 2^2145205042 is an apocalyptic number.

2145205042 is a deficient number, since it is larger than the sum of its proper divisors (1082324990).

2145205042 is a wasteful number, since it uses less digits than its factorization.

2145205042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240824.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2145205042 is about 46316.3582549406. The cubic root of 2145205042 is about 1289.7026821157.

The spelling of 2145205042 in words is "two billion, one hundred forty-five million, two hundred five thousand, forty-two".