1250040749 has 2 divisors, whose sum is σ = 1250040750. Its totient is φ = 1250040748.

The previous prime is 1250040733. The next prime is 1250040763. The reversal of 1250040749 is 9470400521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1244819524 + 5221225 = 35282^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1250040749 - 2⁴ = 1250040733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1250040769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625020374 + 625020375.

It is an arithmetic number, because the mean of its divisors is an integer number (625020375).

Almost surely, 2^1250040749 is an apocalyptic number.

It is an amenable number.

1250040749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1250040749 is an equidigital number, since it uses as much as digits as its factorization.

1250040749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1250040749 is about 35355.9153325154. The cubic root of 1250040749 is about 1077.2290503633.

The spelling of 1250040749 in words is "one billion, two hundred fifty million, forty thousand, seven hundred forty-nine".