1026221375 has 24 divisors (see below), whose sum is σ = 1294452432. Its totient is φ = 812268000.

The previous prime is 1026221363. The next prime is 1026221401. The reversal of 1026221375 is 5731226201.

It is a happy number.

It is not a de Polignac number, because 1026221375 - 2¹⁶ = 1026155839 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 1484780 + ... + 1485470.

It is an arithmetic number, because the mean of its divisors is an integer number (53935518).

Almost surely, 2^1026221375 is an apocalyptic number.

1026221375 is a deficient number, since it is larger than the sum of its proper divisors (268231057).

1026221375 is an frugal number, since it uses more digits than its factorization.

1026221375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1026221375 is about 32034.6901811146. The cubic root of 1026221375 is about 1008.6651565215.

Adding to 1026221375 its reverse (5731226201), we get a palindrome (6757447576).

The spelling of 1026221375 in words is "one billion, twenty-six million, two hundred twenty-one thousand, three hundred seventy-five".