1288280625 has 20 divisors (see below), whose sum is σ = 2146450416. Its totient is φ = 687082000.

The previous prime is 1288280611. The next prime is 1288280627. The reversal of 1288280625 is 5260828821.

It is not a de Polignac number, because 1288280625 - 2¹⁷ = 1288149553 is a prime.

It is a super-4 number, since 4×1288280625⁴ (a number of 38 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1288280627) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 341667 + ... + 345416.

Almost surely, 2^1288280625 is an apocalyptic number.

1288280625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1288280625 is a deficient number, since it is larger than the sum of its proper divisors (858169791).

1288280625 is an frugal number, since it uses more digits than its factorization.

1288280625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687106 (or 687091 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 1288280625 is about 35892.6263318805. The cubic root of 1288280625 is about 1088.1033776776.

The spelling of 1288280625 in words is "one billion, two hundred eighty-eight million, two hundred eighty thousand, six hundred twenty-five".