1250666213 has 2 divisors, whose sum is σ = 1250666214. Its totient is φ = 1250666212.

The previous prime is 1250666191. The next prime is 1250666227. The reversal of 1250666213 is 3126660521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232150404 + 18515809 = 35102^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 1250666213 - 2²⁰ = 1249617637 is a prime.

It is a super-2 number, since 2×1250666213² = 3128331952679522738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1250666213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250666233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625333106 + 625333107.

It is an arithmetic number, because the mean of its divisors is an integer number (625333107).

Almost surely, 2^1250666213 is an apocalyptic number.

It is an amenable number.

1250666213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250666213 is an equidigital number, since it uses as much as digits as its factorization.

1250666213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1250666213 is about 35364.7594788937. The cubic root of 1250666213 is about 1077.4086860134.

The spelling of 1250666213 in words is "one billion, two hundred fifty million, six hundred sixty-six thousand, two hundred thirteen".