1252619149 has 2 divisors, whose sum is σ = 1252619150. Its totient is φ = 1252619148.

The previous prime is 1252619131. The next prime is 1252619189. The reversal of 1252619149 is 9419162521.

It is an a-pointer prime, because the next prime (1252619189) can be obtained adding 1252619149 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 974563524 + 278055625 = 31218^2 + 16675^2 .

It is an emirp because it is prime and its reverse (9419162521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1252619149 - 2⁵ = 1252619117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252619189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626309574 + 626309575.

It is an arithmetic number, because the mean of its divisors is an integer number (626309575).

Almost surely, 2^1252619149 is an apocalyptic number.

It is an amenable number.

1252619149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252619149 is an equidigital number, since it uses as much as digits as its factorization.

1252619149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 1252619149 is about 35392.3600371606. The cubic root of 1252619149 is about 1077.9691915359.

The spelling of 1252619149 in words is "one billion, two hundred fifty-two million, six hundred nineteen thousand, one hundred forty-nine".