2045120405 has 8 divisors (see below), whose sum is σ = 2455366200. Its totient is φ = 1635281856.

The previous prime is 2045120393. The next prime is 2045120411. The reversal of 2045120405 is 5040215402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 735114769 + 1310005636 = 27113^2 + 36194^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2045120405 - 2⁸ = 2045120149 is a prime.

It is a congruent number.

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, 90650 + ... + 110939.

It is an arithmetic number, because the mean of its divisors is an integer number (306920775).

Almost surely, 2^2045120405 is an apocalyptic number.

It is an amenable number.

2045120405 is a deficient number, since it is larger than the sum of its proper divisors (410245795).

2045120405 is a wasteful number, since it uses less digits than its factorization.

2045120405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203623.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 2045120405 is about 45223.0074740723. The cubic root of 2045120405 is about 1269.3253707157.

Adding to 2045120405 its reverse (5040215402), we get a palindrome (7085335807).

The spelling of 2045120405 in words is "two billion, forty-five million, one hundred twenty thousand, four hundred five".