1000425221 has 12 divisors (see below), whose sum is σ = 1078333632. Its totient is φ = 927590184.

The previous prime is 1000425169. The next prime is 1000425281. The reversal of 1000425221 is 1225240001.

It is not a de Polignac number, because 1000425221 - 2¹⁸ = 1000163077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1000425221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000425281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12515 + ... + 46448.

It is an arithmetic number, because the mean of its divisors is an integer number (89861136).

Almost surely, 2^1000425221 is an apocalyptic number.

It is an amenable number.

1000425221 is a deficient number, since it is larger than the sum of its proper divisors (77908411).

1000425221 is an equidigital number, since it uses as much as digits as its factorization.

1000425221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59048 (or 59029 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1000425221 is about 31629.4992214546. The cubic root of 1000425221 is about 1000.1417202478.

Adding to 1000425221 its reverse (1225240001), we get a palindrome (2225665222).

The spelling of 1000425221 in words is "one billion, four hundred twenty-five thousand, two hundred twenty-one".