1245242556 has 36 divisors (see below), whose sum is σ = 3187548000. Its totient is φ = 409825728.

The previous prime is 1245242527. The next prime is 1245242573. The reversal of 1245242556 is 6552425421.

1245242556 is a `hidden beast` number, since 12 + 4 + 52 + 42 + 556 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1245242556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216081 + ... + 221768.

It is an arithmetic number, because the mean of its divisors is an integer number (88543000).

Almost surely, 2^1245242556 is an apocalyptic number.

It is an amenable number.

1245242556 is an abundant number, since it is smaller than the sum of its proper divisors (1942305444).

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

1245242556 is a wasteful number, since it uses less digits than its factorization.

1245242556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437938 (or 437933 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 1245242556 is about 35287.9945023800. The cubic root of 1245242556 is about 1075.8489939320.

Adding to 1245242556 its reverse (6552425421), we get a palindrome (7797667977).

The spelling of 1245242556 in words is "one billion, two hundred forty-five million, two hundred forty-two thousand, five hundred fifty-six".