1289957425 has 12 divisors (see below), whose sum is σ = 1619797120. Its totient is φ = 1018901520.

The previous prime is 1289957419. The next prime is 1289957447. The reversal of 1289957425 is 5247599821.

It is not a de Polignac number, because 1289957425 - 2¹³ = 1289949233 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324597 + ... + 328546.

Almost surely, 2^1289957425 is an apocalyptic number.

It is an amenable number.

1289957425 is a deficient number, since it is larger than the sum of its proper divisors (329839695).

1289957425 is an equidigital number, since it uses as much as digits as its factorization.

1289957425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653232 (or 653227 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The square root of 1289957425 is about 35915.9772942349. The cubic root of 1289957425 is about 1088.5752574552.

The spelling of 1289957425 in words is "one billion, two hundred eighty-nine million, nine hundred fifty-seven thousand, four hundred twenty-five".