1280042575 has 24 divisors (see below), whose sum is σ = 1892878848. Its totient is φ = 839578080.

The previous prime is 1280042573. The next prime is 1280042593. The reversal of 1280042575 is 5752400821.

It is a happy number.

It is not a de Polignac number, because 1280042575 - 2¹ = 1280042573 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 self number, because there is not a number n which added to its sum of digits gives 1280042575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280042573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154987 + ... + 163036.

It is an arithmetic number, because the mean of its divisors is an integer number (78869952).

Almost surely, 2^1280042575 is an apocalyptic number.

1280042575 is a deficient number, since it is larger than the sum of its proper divisors (612836273).

1280042575 is a wasteful number, since it uses less digits than its factorization.

1280042575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318063 (or 318058 counting only the distinct ones).

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

The square root of 1280042575 is about 35777.6826387624. The cubic root of 1280042575 is about 1085.7790846639.

The spelling of 1280042575 in words is "one billion, two hundred eighty million, forty-two thousand, five hundred seventy-five".