1000622405 has 4 divisors (see below), whose sum is σ = 1200746892. Its totient is φ = 800497920.

The previous prime is 1000622401. The next prime is 1000622419. The reversal of 1000622405 is 5042260001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 462336004 + 538286401 = 21502^2 + 23201^2 .

It is not a de Polignac number, because 1000622405 - 2² = 1000622401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000622401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100062236 + ... + 100062245.

It is an arithmetic number, because the mean of its divisors is an integer number (300186723).

Almost surely, 2^1000622405 is an apocalyptic number.

It is an amenable number.

1000622405 is a deficient number, since it is larger than the sum of its proper divisors (200124487).

1000622405 is an equidigital number, since it uses as much as digits as its factorization.

1000622405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200124486.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1000622405 is about 31632.6161580101. The cubic root of 1000622405 is about 1000.2074253051.

Adding to 1000622405 its reverse (5042260001), we get a palindrome (6042882406).

The spelling of 1000622405 in words is "one billion, six hundred twenty-two thousand, four hundred five".