1000405215 has 16 divisors (see below), whose sum is σ = 1778498400. Its totient is φ = 533549376.

The previous prime is 1000405201. The next prime is 1000405261. The reversal of 1000405215 is 5125040001.

1000405215 is a `hidden beast` number, since 100 + 0 + 40 + 521 + 5 = 666.

It is not a de Polignac number, because 1000405215 - 2⁵ = 1000405183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3705070 + ... + 3705339.

It is an arithmetic number, because the mean of its divisors is an integer number (111156150).

Almost surely, 2^1000405215 is an apocalyptic number.

1000405215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1000405215 is a deficient number, since it is larger than the sum of its proper divisors (778093185).

1000405215 is an equidigital number, since it uses as much as digits as its factorization.

1000405215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7410423 (or 7410417 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1000405215 is about 31629.1829644713. The cubic root of 1000405215 is about 1000.1350534264.

Adding to 1000405215 its reverse (5125040001), we get a palindrome (6125445216).

The spelling of 1000405215 in words is "one billion, four hundred five thousand, two hundred fifteen".