1254242149 has 2 divisors, whose sum is σ = 1254242150. Its totient is φ = 1254242148.

The previous prime is 1254242147. The next prime is 1254242159. The reversal of 1254242149 is 9412424521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1251885924 + 2356225 = 35382^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254242149 - 2¹ = 1254242147 is a prime.

Together with 1254242147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1254242147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627121074 + 627121075.

It is an arithmetic number, because the mean of its divisors is an integer number (627121075).

Almost surely, 2^1254242149 is an apocalyptic number.

It is an amenable number.

1254242149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254242149 is an equidigital number, since it uses as much as digits as its factorization.

1254242149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 34.

The square root of 1254242149 is about 35415.2812921202. The cubic root of 1254242149 is about 1078.4345601526.

The spelling of 1254242149 in words is "one billion, two hundred fifty-four million, two hundred forty-two thousand, one hundred forty-nine".