1001012249 has 2 divisors, whose sum is σ = 1001012250.
Its totient is φ = 1001012248.
The previous prime is 1001012237. The next prime is 1001012269. The reversal of 1001012249 is 9422101001.
It is an a-pointer prime, because the next prime (1001012269) can be obtained adding 1001012249 to its sum of digits (20).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 651883024 + 349129225 = 25532^2 + 18685^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1001012249 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 1001012249.
It is not a weakly prime, because it can be changed into another prime (1001012269) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500506124 + 500506125.
It is an arithmetic number, because the mean of its divisors is an integer number (500506125).
Almost surely, 21001012249 is an apocalyptic number.
It is an amenable number.
1001012249 is a deficient number, since it is larger than the sum of its proper divisors (1).
1001012249 is an equidigital number, since it uses as much as digits as its factorization.
1001012249 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 144, while the sum is 20.
The square root of 1001012249 is about 31638.7776154516.
Note that the first 3 decimals coincide.
The cubic root of 1001012249 is about 1000.3373025475.
The spelling of 1001012249 in words is "one billion, one million, twelve thousand, two hundred forty-nine".