122648657 has 4 divisors (see below), whose sum is σ = 122954916. Its totient is φ = 122342400.

The previous prime is 122648651. The next prime is 122648663. The reversal of 122648657 is 756846221.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (122648651) and next prime (122648663).

It can be written as a sum of positive squares in 2 ways, for example, as 102434641 + 20214016 = 10121^2 + 4496^2 .

It is a cyclic number.

It is not a de Polignac number, because 122648657 - 2¹⁴ = 122632273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122648651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152528 + ... + 153329.

It is an arithmetic number, because the mean of its divisors is an integer number (30738729).

Almost surely, 2^122648657 is an apocalyptic number.

It is an amenable number.

122648657 is a deficient number, since it is larger than the sum of its proper divisors (306259).

122648657 is an equidigital number, since it uses as much as digits as its factorization.

122648657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306258.

The product of its digits is 161280, while the sum is 41.

The square root of 122648657 is about 11074.6854131393. The cubic root of 122648657 is about 496.8450099484.

The spelling of 122648657 in words is "one hundred twenty-two million, six hundred forty-eight thousand, six hundred fifty-seven".