1012002197 has 8 divisors (see below), whose sum is σ = 1074159000. Its totient is φ = 950137344.

The previous prime is 1012002191. The next prime is 1012002227. The reversal of 1012002197 is 7912002101.

It can be written as a sum of positive squares in 4 ways, for example, as 650964196 + 361038001 = 25514^2 + 19001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1012002197 - 2¹² = 1011998101 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 (1012002191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65822 + ... + 79727.

It is an arithmetic number, because the mean of its divisors is an integer number (134269875).

Almost surely, 2^1012002197 is an apocalyptic number.

1012002197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1012002197 is a deficient number, since it is larger than the sum of its proper divisors (62156803).

1012002197 is a wasteful number, since it uses less digits than its factorization.

1012002197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145975.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1012002197 is about 31811.9819722066. The cubic root of 1012002197 is about 1003.9848323529.

Adding to 1012002197 its reverse (7912002101), we get a palindrome (8924004298).

The spelling of 1012002197 in words is "one billion, twelve million, two thousand, one hundred ninety-seven".