1248746549 has 2 divisors, whose sum is σ = 1248746550. Its totient is φ = 1248746548.

The previous prime is 1248746533. The next prime is 1248746573. The reversal of 1248746549 is 9456478421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240307524 + 8439025 = 35218^2 + 2905^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248746549 - 2⁴ = 1248746533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1248746497 and 1248746506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1248746449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624373274 + 624373275.

It is an arithmetic number, because the mean of its divisors is an integer number (624373275).

Almost surely, 2^1248746549 is an apocalyptic number.

It is an amenable number.

1248746549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1248746549 is an equidigital number, since it uses as much as digits as its factorization.

1248746549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 50.

The square root of 1248746549 is about 35337.6081392049. The cubic root of 1248746549 is about 1076.8571608207.

The spelling of 1248746549 in words is "one billion, two hundred forty-eight million, seven hundred forty-six thousand, five hundred forty-nine".