1240425655 has 16 divisors (see below), whose sum is σ = 1801224000. Its totient is φ = 800543232.

The previous prime is 1240425653. The next prime is 1240425679. The reversal of 1240425655 is 5565240421.

It is a cyclic number.

It is not a de Polignac number, because 1240425655 - 2¹ = 1240425653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1240425655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240425653) 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 15 ways as a sum of consecutive naturals, for example, 1041780 + ... + 1042969.

It is an arithmetic number, because the mean of its divisors is an integer number (112576500).

Almost surely, 2^1240425655 is an apocalyptic number.

1240425655 is a deficient number, since it is larger than the sum of its proper divisors (560798345).

1240425655 is a wasteful number, since it uses less digits than its factorization.

1240425655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084778.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 1240425655 is about 35219.6770995987. The cubic root of 1240425655 is about 1074.4599862122.

The spelling of 1240425655 in words is "one billion, two hundred forty million, four hundred twenty-five thousand, six hundred fifty-five".