1245156636 has 48 divisors (see below), whose sum is σ = 3110879520. Its totient is φ = 386242560.

The previous prime is 1245156623. The next prime is 1245156637. The reversal of 1245156636 is 6366515421.

It is a junction number, because it is equal to n+sod(n) for n = 1245156594 and 1245156603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245156637) 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, 16135 + ... + 52446.

It is an arithmetic number, because the mean of its divisors is an integer number (64809990).

Almost surely, 2^1245156636 is an apocalyptic number.

It is an amenable number.

1245156636 is an abundant number, since it is smaller than the sum of its proper divisors (1865722884).

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

1245156636 is a wasteful number, since it uses less digits than its factorization.

1245156636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68694 (or 68692 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 1245156636 is about 35286.7770701718. Note that the first 3 decimals coincide. The cubic root of 1245156636 is about 1075.8242493361.

The spelling of 1245156636 in words is "one billion, two hundred forty-five million, one hundred fifty-six thousand, six hundred thirty-six".