1026021625 has 16 divisors (see below), whose sum is σ = 1292923008. Its totient is φ = 812838000.

The previous prime is 1026021617. The next prime is 1026021629. The reversal of 1026021625 is 5261206201.

It is not a de Polignac number, because 1026021625 - 2³ = 1026021617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 1026021625.

It is not an unprimeable number, because it can be changed into a prime (1026021629) by changing a digit.

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, 26971 + ... + 52720.

It is an arithmetic number, because the mean of its divisors is an integer number (80807688).

Almost surely, 2^1026021625 is an apocalyptic number.

It is an amenable number.

1026021625 is a deficient number, since it is larger than the sum of its proper divisors (266901383).

1026021625 is an equidigital number, since it uses as much as digits as its factorization.

1026021625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79809 (or 79799 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1026021625 is about 32031.5723154515. The cubic root of 1026021625 is about 1008.5997080248.

Adding to 1026021625 its reverse (5261206201), we get a palindrome (6287227826).

The spelling of 1026021625 in words is "one billion, twenty-six million, twenty-one thousand, six hundred twenty-five".