1250009 has 2 divisors, whose sum is σ = 1250010.
Its totient is φ = 1250008.
The previous prime is 1250003. The next prime is 1250021. The reversal of 1250009 is 9000521.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 855625 + 394384 = 925^2 + 628^2
It is a cyclic number.
It is not a de Polignac number, because 1250009 - 216 = 1184473 is a prime.
It is not a weakly prime, because it can be changed into another prime (1250003) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625004 + 625005.
It is an arithmetic number, because the mean of its divisors is an integer number (625005).
21250009 is an apocalyptic number.
It is an amenable number.
1250009 is a deficient number, since it is larger than the sum of its proper divisors (1).
1250009 is an equidigital number, since it uses as much as digits as its factorization.
1250009 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 90, while the sum is 17.
The square root of 1250009 is about 1118.0380136650.
The cubic root of 1250009 is about 107.7219930331.
The spelling of 1250009 in words is "one million, two hundred fifty thousand, nine".