1280475025 has 12 divisors (see below), whose sum is σ = 1597535152. Its totient is φ = 1018092240.

The previous prime is 1280475023. The next prime is 1280475041. The reversal of 1280475025 is 5205740821.

It is a happy number.

It is not a de Polignac number, because 1280475025 - 2¹ = 1280475023 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280475023) 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, 153039 + ... + 161188.

Almost surely, 2^1280475025 is an apocalyptic number.

It is an amenable number.

1280475025 is a deficient number, since it is larger than the sum of its proper divisors (317060127).

1280475025 is a wasteful number, since it uses less digits than its factorization.

1280475025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314400 (or 314395 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 1280475025 is about 35783.7257003795. The cubic root of 1280475025 is about 1085.9013442166.

The spelling of 1280475025 in words is "one billion, two hundred eighty million, four hundred seventy-five thousand, twenty-five".