122915378 has 4 divisors (see below), whose sum is σ = 184373070. Its totient is φ = 61457688.

The previous prime is 122915363. The next prime is 122915383. The reversal of 122915378 is 873519221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873519221 = 6733 ⋅129737.

It can be written as a sum of positive squares in only one way, i.e., 99460729 + 23454649 = 9973^2 + 4843^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30728843 + ... + 30728846.

Almost surely, 2^122915378 is an apocalyptic number.

122915378 is a deficient number, since it is larger than the sum of its proper divisors (61457692).

122915378 is an equidigital number, since it uses as much as digits as its factorization.

122915378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61457691.

The product of its digits is 30240, while the sum is 38.

The square root of 122915378 is about 11086.7207956185. The cubic root of 122915378 is about 497.2049080375.

The spelling of 122915378 in words is "one hundred twenty-two million, nine hundred fifteen thousand, three hundred seventy-eight".