1000626421 has 8 divisors (see below), whose sum is σ = 1003857624. Its totient is φ = 997401600.

The previous prime is 1000626391. The next prime is 1000626433. The reversal of 1000626421 is 1246260001.

It can be written as a sum of positive squares in 4 ways, for example, as 183467025 + 817159396 = 13545^2 + 28586^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1000626421 - 2¹⁹ = 1000102133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000626392 and 1000626401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000626481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768471 + ... + 769771.

It is an arithmetic number, because the mean of its divisors is an integer number (125482203).

Almost surely, 2^1000626421 is an apocalyptic number.

It is an amenable number.

1000626421 is a deficient number, since it is larger than the sum of its proper divisors (3231203).

1000626421 is a wasteful number, since it uses less digits than its factorization.

1000626421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1000626421 is about 31632.6796367301. The cubic root of 1000626421 is about 1000.2087634148.

Adding to 1000626421 its reverse (1246260001), we get a palindrome (2246886422).

The spelling of 1000626421 in words is "one billion, six hundred twenty-six thousand, four hundred twenty-one".