405212045 has 16 divisors (see below), whose sum is σ = 579882240. Its totient is φ = 265778304.

The previous prime is 405212029. The next prime is 405212053. The reversal of 405212045 is 540212504.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 405212045 - 2⁴ = 405212029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 405212045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250880 + ... + 252489.

It is an arithmetic number, because the mean of its divisors is an integer number (36242640).

Almost surely, 2^405212045 is an apocalyptic number.

It is an amenable number.

405212045 is a deficient number, since it is larger than the sum of its proper divisors (174670195).

405212045 is a wasteful number, since it uses less digits than its factorization.

405212045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503404.

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

The square root of 405212045 is about 20129.8794084813. The cubic root of 405212045 is about 739.9927227188.

Adding to 405212045 its reverse (540212504), we get a palindrome (945424549).

The spelling of 405212045 in words is "four hundred five million, two hundred twelve thousand, forty-five".