1245619489 has 2 divisors, whose sum is σ = 1245619490. Its totient is φ = 1245619488.

The previous prime is 1245619391. The next prime is 1245619493. The reversal of 1245619489 is 9849165421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1240237089 + 5382400 = 35217^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245619489 - 2¹¹ = 1245617441 is a prime.

It is a super-2 number, since 2×1245619489² = 3103135822753242242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1245619589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622809744 + 622809745.

It is an arithmetic number, because the mean of its divisors is an integer number (622809745).

Almost surely, 2^1245619489 is an apocalyptic number.

It is an amenable number.

1245619489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245619489 is an equidigital number, since it uses as much as digits as its factorization.

1245619489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 49.

The square root of 1245619489 is about 35293.3349090165. The cubic root of 1245619489 is about 1075.9575355910.

The spelling of 1245619489 in words is "one billion, two hundred forty-five million, six hundred nineteen thousand, four hundred eighty-nine".