1295840655 has 24 divisors (see below), whose sum is σ = 2249996112. Its totient is φ = 689923584.

The previous prime is 1295840653. The next prime is 1295840671. The reversal of 1295840655 is 5560485921.

1295840655 is a `hidden beast` number, since 1 + 2 + 9 + 584 + 0 + 65 + 5 = 666.

It is not a de Polignac number, because 1295840655 - 2¹ = 1295840653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1295840655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1295840653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1887 + ... + 50943.

It is an arithmetic number, because the mean of its divisors is an integer number (93749838).

Almost surely, 2^1295840655 is an apocalyptic number.

1295840655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1295840655 is a deficient number, since it is larger than the sum of its proper divisors (954155457).

1295840655 is a wasteful number, since it uses less digits than its factorization.

1295840655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49655 (or 49652 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 1295840655 is about 35997.7868069691. The cubic root of 1295840655 is about 1090.2276703677.

The spelling of 1295840655 in words is "one billion, two hundred ninety-five million, eight hundred forty thousand, six hundred fifty-five".