405042469 has 6 divisors (see below), whose sum is σ = 438596466. Its totient is φ = 373885200.

The previous prime is 405042467. The next prime is 405042479. The reversal of 405042469 is 964240504.

It can be written as a sum of positive squares in 3 ways, for example, as 53479969 + 351562500 = 7313^2 + 18750^2 .

It is not a de Polignac number, because 405042469 - 2¹ = 405042467 is a prime.

It is a super-2 number, since 2×405042469² = 328118803387231922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405042461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1198182 + ... + 1198519.

It is an arithmetic number, because the mean of its divisors is an integer number (73099411).

Almost surely, 2^405042469 is an apocalyptic number.

It is an amenable number.

405042469 is a deficient number, since it is larger than the sum of its proper divisors (33553997).

405042469 is a wasteful number, since it uses less digits than its factorization.

405042469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396727 (or 2396714 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 405042469 is about 20125.6669206265. Note that the first 3 decimals coincide. The cubic root of 405042469 is about 739.8894825213.

The spelling of 405042469 in words is "four hundred five million, forty-two thousand, four hundred sixty-nine".