781289425 has 12 divisors (see below), whose sum is σ = 1107198976. Its totient is φ = 535741200.

The previous prime is 781289423. The next prime is 781289449. The reversal of 781289425 is 524982187.

781289425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 781289425 - 2¹ = 781289423 is a prime.

It is a super-2 number, since 2×781289425² = 1220826331233661250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781289423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2232081 + ... + 2232430.

Almost surely, 2^781289425 is an apocalyptic number.

It is an amenable number.

781289425 is a deficient number, since it is larger than the sum of its proper divisors (325909551).

781289425 is a wasteful number, since it uses less digits than its factorization.

781289425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464528 (or 4464523 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 781289425 is about 27951.5549656902. The cubic root of 781289425 is about 921.0233669800.

The spelling of 781289425 in words is "seven hundred eighty-one million, two hundred eighty-nine thousand, four hundred twenty-five".