1026417221 has 6 divisors (see below), whose sum is σ = 1083282822. Its totient is φ = 972394920.

The previous prime is 1026417209. The next prime is 1026417229. The reversal of 1026417221 is 1227146201.

It can be written as a sum of positive squares in only one way, i.e., 1012830625 + 13586596 = 31825^2 + 3686^2 .

It is not a de Polignac number, because 1026417221 - 2¹⁰ = 1026416197 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 (1026417229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1421270 + ... + 1421991.

It is an arithmetic number, because the mean of its divisors is an integer number (180547137).

Almost surely, 2^1026417221 is an apocalyptic number.

It is an amenable number.

1026417221 is a deficient number, since it is larger than the sum of its proper divisors (56865601).

1026417221 is an equidigital number, since it uses as much as digits as its factorization.

1026417221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843299 (or 2843280 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1026417221 is about 32037.7468152803. The cubic root of 1026417221 is about 1008.7293176197.

The spelling of 1026417221 in words is "one billion, twenty-six million, four hundred seventeen thousand, two hundred twenty-one".