1206122251 has 8 divisors (see below), whose sum is σ = 1209601280. Its totient is φ = 1202649768.

The previous prime is 1206122237. The next prime is 1206122257. The reversal of 1206122251 is 1522216021.

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 1206122251 - 2⁷ = 1206122123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206122257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 832810 + ... + 834256.

It is an arithmetic number, because the mean of its divisors is an integer number (151200160).

Almost surely, 2^1206122251 is an apocalyptic number.

1206122251 is a deficient number, since it is larger than the sum of its proper divisors (3479029).

1206122251 is an equidigital number, since it uses as much as digits as its factorization.

1206122251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1206122251 is about 34729.2708100818. The cubic root of 1206122251 is about 1064.4626885457.

Adding to 1206122251 its reverse (1522216021), we get a palindrome (2728338272).

The spelling of 1206122251 in words is "one billion, two hundred six million, one hundred twenty-two thousand, two hundred fifty-one".