1245504789 has 16 divisors (see below), whose sum is σ = 1908820800. Its totient is φ = 801703728.

The previous prime is 1245504781. The next prime is 1245504803. The reversal of 1245504789 is 9874055421.

1245504789 is a `hidden beast` number, since 1 + 24 + 550 + 4 + 78 + 9 = 666.

It is not a de Polignac number, because 1245504789 - 2³ = 1245504781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245504781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794559 + ... + 796124.

It is an arithmetic number, because the mean of its divisors is an integer number (119301300).

Almost surely, 2^1245504789 is an apocalyptic number.

It is an amenable number.

1245504789 is a deficient number, since it is larger than the sum of its proper divisors (663316011).

1245504789 is a wasteful number, since it uses less digits than its factorization.

1245504789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590721 (or 1590715 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 1245504789 is about 35291.7099189031. The cubic root of 1245504789 is about 1075.9245088873.

The spelling of 1245504789 in words is "one billion, two hundred forty-five million, five hundred four thousand, seven hundred eighty-nine".