1121622657 has 4 divisors (see below), whose sum is σ = 1495496880. Its totient is φ = 747748436.

The previous prime is 1121622653. The next prime is 1121622661. The reversal of 1121622657 is 7562261211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (1121622653) and next prime (1121622661).

It is a cyclic number.

It is not a de Polignac number, because 1121622657 - 2² = 1121622653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121622653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186937107 + ... + 186937112.

It is an arithmetic number, because the mean of its divisors is an integer number (373874220).

Almost surely, 2^1121622657 is an apocalyptic number.

It is an amenable number.

1121622657 is a deficient number, since it is larger than the sum of its proper divisors (373874223).

1121622657 is an equidigital number, since it uses as much as digits as its factorization.

1121622657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373874222.

The product of its digits is 10080, while the sum is 33.

The square root of 1121622657 is about 33490.6353627398. The cubic root of 1121622657 is about 1039.0001043673. Note that the first 3 decimals are identical.

Adding to 1121622657 its reverse (7562261211), we get a palindrome (8683883868).

The spelling of 1121622657 in words is "one billion, one hundred twenty-one million, six hundred twenty-two thousand, six hundred fifty-seven".