1213552105 has 16 divisors (see below), whose sum is σ = 1529798400. Its totient is φ = 922385728.

The previous prime is 1213552091. The next prime is 1213552129. The reversal of 1213552105 is 5012553121.

It is a cyclic number.

It is not a de Polignac number, because 1213552105 - 2¹¹ = 1213550057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213552105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18277 + ... + 52546.

It is an arithmetic number, because the mean of its divisors is an integer number (95612400).

Almost surely, 2^1213552105 is an apocalyptic number.

It is an amenable number.

1213552105 is a deficient number, since it is larger than the sum of its proper divisors (316246295).

1213552105 is a wasteful number, since it uses less digits than its factorization.

1213552105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71000.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 1213552105 is about 34836.0747645311. The cubic root of 1213552105 is about 1066.6439538892.

The spelling of 1213552105 in words is "one billion, two hundred thirteen million, five hundred fifty-two thousand, one hundred five".