1245404556 has 36 divisors (see below), whose sum is σ = 3434298504. Its totient is φ = 377395200.

The previous prime is 1245404551. The next prime is 1245404593. The reversal of 1245404556 is 6554045421.

1245404556 is a `hidden beast` number, since 1 + 24 + 540 + 45 + 56 = 666.

1245404556 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1245404556.

It is not an unprimeable number, because it can be changed into a prime (1245404551) 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, 1572085 + ... + 1572876.

Almost surely, 2^1245404556 is an apocalyptic number.

It is an amenable number.

1245404556 is an abundant number, since it is smaller than the sum of its proper divisors (2188893948).

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

1245404556 is a wasteful number, since it uses less digits than its factorization.

1245404556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144982 (or 3144977 counting only the distinct ones).

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

The square root of 1245404556 is about 35290.2898259564. The cubic root of 1245404556 is about 1075.8956461495.

Adding to 1245404556 its reverse (6554045421), we get a palindrome (7799449977).

The spelling of 1245404556 in words is "one billion, two hundred forty-five million, four hundred four thousand, five hundred fifty-six".