1280525240 has 64 divisors (see below), whose sum is σ = 2914889760. Its totient is φ = 506257920.

The previous prime is 1280525231. The next prime is 1280525249. The reversal of 1280525240 is 425250821.

It is an interprime number because it is at equal distance from previous prime (1280525231) and next prime (1280525249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280525249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1459682 + ... + 1460558.

Almost surely, 2^1280525240 is an apocalyptic number.

1280525240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280525240 is an abundant number, since it is smaller than the sum of its proper divisors (1634364520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1280525240 is a wasteful number, since it uses less digits than its factorization.

1280525240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1268 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 1280525240 is about 35784.4273392771. The cubic root of 1280525240 is about 1085.9155389027.

The spelling of 1280525240 in words is "one billion, two hundred eighty million, five hundred twenty-five thousand, two hundred forty".