1212875755 has 32 divisors (see below), whose sum is σ = 1799368704. Its totient is φ = 764263296.

The previous prime is 1212875753. The next prime is 1212875821. The reversal of 1212875755 is 5575782121.

It is a cyclic number.

It is not a de Polignac number, because 1212875755 - 2¹ = 1212875753 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1212875753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97414 + ... + 109156.

It is an arithmetic number, because the mean of its divisors is an integer number (56230272).

Almost surely, 2^1212875755 is an apocalyptic number.

1212875755 is a deficient number, since it is larger than the sum of its proper divisors (586492949).

1212875755 is a wasteful number, since it uses less digits than its factorization.

1212875755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11995.

The product of its digits is 196000, while the sum is 43.

The square root of 1212875755 is about 34826.3658023630. The cubic root of 1212875755 is about 1066.4457592118.

The spelling of 1212875755 in words is "one billion, two hundred twelve million, eight hundred seventy-five thousand, seven hundred fifty-five".