405245145 has 32 divisors (see below), whose sum is σ = 665013888. Its totient is φ = 210659328.

The previous prime is 405245131. The next prime is 405245147. The reversal of 405245145 is 541542504.

It is not a de Polignac number, because 405245145 - 2¹⁸ = 404983001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405245147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 95407 + ... + 99563.

It is an arithmetic number, because the mean of its divisors is an integer number (20781684).

Almost surely, 2^405245145 is an apocalyptic number.

It is an amenable number.

405245145 is a deficient number, since it is larger than the sum of its proper divisors (259768743).

405245145 is a wasteful number, since it uses less digits than its factorization.

405245145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 405245145 is about 20130.7015526037. The cubic root of 405245145 is about 740.0128710934.

Adding to 405245145 its reverse (541542504), we get a palindrome (946787649).

The spelling of 405245145 in words is "four hundred five million, two hundred forty-five thousand, one hundred forty-five".