1211412755 has 8 divisors (see below), whose sum is σ = 1661366112. Its totient is φ = 830683008.

The previous prime is 1211412749. The next prime is 1211412757. The reversal of 1211412755 is 5572141121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211412755 - 2⁴ = 1211412739 is a prime.

It is a super-3 number, since 3×1211412755³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1211412757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17305862 + ... + 17305931.

It is an arithmetic number, because the mean of its divisors is an integer number (207670764).

Almost surely, 2^1211412755 is an apocalyptic number.

1211412755 is a deficient number, since it is larger than the sum of its proper divisors (449953357).

1211412755 is an equidigital number, since it uses as much as digits as its factorization.

1211412755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34611805.

The product of its digits is 2800, while the sum is 29.

The square root of 1211412755 is about 34805.3552632350. The cubic root of 1211412755 is about 1066.0167958216.

Adding to 1211412755 its reverse (5572141121), we get a palindrome (6783553876).

The spelling of 1211412755 in words is "one billion, two hundred eleven million, four hundred twelve thousand, seven hundred fifty-five".