122446778 has 4 divisors (see below), whose sum is σ = 183670170. Its totient is φ = 61223388.

The previous prime is 122446777. The next prime is 122446783. The reversal of 122446778 is 877644221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877644221 = 2347 ⋅373943.

It can be written as a sum of positive squares in only one way, i.e., 100140049 + 22306729 = 10007^2 + 4723^2 .

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122446777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30611693 + ... + 30611696.

Almost surely, 2^122446778 is an apocalyptic number.

122446778 is a deficient number, since it is larger than the sum of its proper divisors (61223392).

122446778 is an equidigital number, since it uses as much as digits as its factorization.

122446778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61223391.

The product of its digits is 150528, while the sum is 41.

The square root of 122446778 is about 11065.5672245032. The cubic root of 122446778 is about 496.5722588802.

The spelling of 122446778 in words is "one hundred twenty-two million, four hundred forty-six thousand, seven hundred seventy-eight".