122012578 has 4 divisors (see below), whose sum is σ = 183018870. Its totient is φ = 61006288.

The previous prime is 122012567. The next prime is 122012581. The reversal of 122012578 is 875210221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875210221 = 6719 ⋅130259.

It can be written as a sum of positive squares in only one way, i.e., 108638929 + 13373649 = 10423^2 + 3657^2 .

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, 30503143 + ... + 30503146.

Almost surely, 2^122012578 is an apocalyptic number.

122012578 is a deficient number, since it is larger than the sum of its proper divisors (61006292).

122012578 is an equidigital number, since it uses as much as digits as its factorization.

122012578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61006291.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 122012578 is about 11045.9303818194. The cubic root of 122012578 is about 495.9846102795.

Adding to 122012578 its reverse (875210221), we get a palindrome (997222799).

The spelling of 122012578 in words is "one hundred twenty-two million, twelve thousand, five hundred seventy-eight".