1248950581 has 2 divisors, whose sum is σ = 1248950582. Its totient is φ = 1248950580.

The previous prime is 1248950561. The next prime is 1248950641. The reversal of 1248950581 is 1850598421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1241928081 + 7022500 = 35241^2 + 2650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248950581 is a prime.

It is a super-2 number, since 2×1248950581² = 3119755107560475122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248950561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624475290 + 624475291.

It is an arithmetic number, because the mean of its divisors is an integer number (624475291).

Almost surely, 2^1248950581 is an apocalyptic number.

It is an amenable number.

1248950581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248950581 is an equidigital number, since it uses as much as digits as its factorization.

1248950581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 43.

The square root of 1248950581 is about 35340.4949173041. The cubic root of 1248950581 is about 1076.9158066564.

The spelling of 1248950581 in words is "one billion, two hundred forty-eight million, nine hundred fifty thousand, five hundred eighty-one".