1245634506 has 144 divisors (see below), whose sum is σ = 3103401600. Its totient is φ = 359901696.

The previous prime is 1245634459. The next prime is 1245634513. The reversal of 1245634506 is 6054365421.

1245634506 is a `hidden beast` number, since 12 + 4 + 5 + 634 + 5 + 0 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 3469555 + ... + 3469913.

It is an arithmetic number, because the mean of its divisors is an integer number (21551400).

Almost surely, 2^1245634506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245634506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551700800).

1245634506 is an abundant number, since it is smaller than the sum of its proper divisors (1857767094).

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

1245634506 is a wasteful number, since it uses less digits than its factorization.

1245634506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 1245634506 is about 35293.5476539268. The cubic root of 1245634506 is about 1075.9618594340.

Adding to 1245634506 its reverse (6054365421), we get a palindrome (7299999927).

The spelling of 1245634506 in words is "one billion, two hundred forty-five million, six hundred thirty-four thousand, five hundred six".