1213388506 has 16 divisors (see below), whose sum is σ = 2071873728. Its totient is φ = 527560000.

The previous prime is 1213388489. The next prime is 1213388543. The reversal of 1213388506 is 6058833121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1198495 + ... + 1199506.

It is an arithmetic number, because the mean of its divisors is an integer number (129492108).

Almost surely, 2^1213388506 is an apocalyptic number.

1213388506 is a deficient number, since it is larger than the sum of its proper divisors (858485222).

1213388506 is a wasteful number, since it uses less digits than its factorization.

1213388506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398037.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 1213388506 is about 34833.7265591840. The cubic root of 1213388506 is about 1066.5960202994.

The spelling of 1213388506 in words is "one billion, two hundred thirteen million, three hundred eighty-eight thousand, five hundred six".