122581398 has 16 divisors (see below), whose sum is σ = 255822336. Its totient is φ = 39083880.

The previous prime is 122581387. The next prime is 122581411. The reversal of 122581398 is 893185221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443998 + ... + 444273.

It is an arithmetic number, because the mean of its divisors is an integer number (15988896).

Almost surely, 2^122581398 is an apocalyptic number.

122581398 is an abundant number, since it is smaller than the sum of its proper divisors (133240938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122581398 is a wasteful number, since it uses less digits than its factorization.

122581398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888299.

The product of its digits is 34560, while the sum is 39.

The square root of 122581398 is about 11071.6483867580. The cubic root of 122581398 is about 496.7541721310.

The spelling of 122581398 in words is "one hundred twenty-two million, five hundred eighty-one thousand, three hundred ninety-eight".