1252525189 has 2 divisors, whose sum is σ = 1252525190. Its totient is φ = 1252525188.

The previous prime is 1252525117. The next prime is 1252525229. The reversal of 1252525189 is 9815252521.

It is an a-pointer prime, because the next prime (1252525229) can be obtained adding 1252525189 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1055600100 + 196925089 = 32490^2 + 14033^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252525189 - 2⁷ = 1252525061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252525489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626262594 + 626262595.

It is an arithmetic number, because the mean of its divisors is an integer number (626262595).

Almost surely, 2^1252525189 is an apocalyptic number.

It is an amenable number.

1252525189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252525189 is an equidigital number, since it uses as much as digits as its factorization.

1252525189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 40.

The square root of 1252525189 is about 35391.0326071450. The cubic root of 1252525189 is about 1077.9422377413.

The spelling of 1252525189 in words is "one billion, two hundred fifty-two million, five hundred twenty-five thousand, one hundred eighty-nine".