1253866049 has 2 divisors, whose sum is σ = 1253866050. Its totient is φ = 1253866048.

The previous prime is 1253866037. The next prime is 1253866051. The reversal of 1253866049 is 9406683521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1235030449 + 18835600 = 35143^2 + 4340^2 .

It is an emirp because it is prime and its reverse (9406683521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253866049 is a prime.

It is a Sophie Germain prime.

Together with 1253866051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1253866079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626933024 + 626933025.

It is an arithmetic number, because the mean of its divisors is an integer number (626933025).

Almost surely, 2^1253866049 is an apocalyptic number.

It is an amenable number.

1253866049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253866049 is an equidigital number, since it uses as much as digits as its factorization.

1253866049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1253866049 is about 35409.9710392426. The cubic root of 1253866049 is about 1078.3267554020.

It can be divided in two parts, 12538 and 66049, that added together give a palindrome (78587).

The spelling of 1253866049 in words is "one billion, two hundred fifty-three million, eight hundred sixty-six thousand, forty-nine".