1022165125 has 8 divisors (see below), whose sum is σ = 1275662232. Its totient is φ = 817732000.

The previous prime is 1022165107. The next prime is 1022165167. The reversal of 1022165125 is 5215612201.

It can be written as a sum of positive squares in 4 ways, for example, as 251603044 + 770562081 = 15862^2 + 27759^2 .

It is not a de Polignac number, because 1022165125 - 2⁵ = 1022165093 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 1022165125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4088536 + ... + 4088785.

It is an arithmetic number, because the mean of its divisors is an integer number (159457779).

Almost surely, 2^1022165125 is an apocalyptic number.

It is an amenable number.

1022165125 is a deficient number, since it is larger than the sum of its proper divisors (253497107).

1022165125 is an frugal number, since it uses more digits than its factorization.

1022165125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8177336 (or 8177326 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1022165125 is about 31971.3172234114. The cubic root of 1022165125 is about 1007.3344493361.

Adding to 1022165125 its reverse (5215612201), we get a palindrome (6237777326).

The spelling of 1022165125 in words is "one billion, twenty-two million, one hundred sixty-five thousand, one hundred twenty-five".