1250198749 has 2 divisors, whose sum is σ = 1250198750. Its totient is φ = 1250198748.

The previous prime is 1250198701. The next prime is 1250198767. The reversal of 1250198749 is 9478910521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1237773124 + 12425625 = 35182^2 + 3525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250198749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1250198699 and 1250198708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250178749) 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, 625099374 + 625099375.

It is an arithmetic number, because the mean of its divisors is an integer number (625099375).

Almost surely, 2^1250198749 is an apocalyptic number.

It is an amenable number.

1250198749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250198749 is an equidigital number, since it uses as much as digits as its factorization.

1250198749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 46.

The square root of 1250198749 is about 35358.1496829232. The cubic root of 1250198749 is about 1077.2744342224.

The spelling of 1250198749 in words is "one billion, two hundred fifty million, one hundred ninety-eight thousand, seven hundred forty-nine".