1250009213 has 2 divisors, whose sum is σ = 1250009214. Its totient is φ = 1250009212.

The previous prime is 1250009209. The next prime is 1250009263. The reversal of 1250009213 is 3129000521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1031501689 + 218507524 = 32117^2 + 14782^2 .

It is an emirp because it is prime and its reverse (3129000521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1250009213 - 2² = 1250009209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250009263) by changing a digit.

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 as a sum of consecutive naturals, namely, 625004606 + 625004607.

It is an arithmetic number, because the mean of its divisors is an integer number (625004607).

Almost surely, 2^1250009213 is an apocalyptic number.

It is an amenable number.

1250009213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250009213 is an equidigital number, since it uses as much as digits as its factorization.

1250009213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1250009213 is about 35355.4693505828. The cubic root of 1250009213 is about 1077.2199915170.

Adding to 1250009213 its reverse (3129000521), we get a palindrome (4379009734).

The spelling of 1250009213 in words is "one billion, two hundred fifty million, nine thousand, two hundred thirteen".