122561398 has 8 divisors (see below), whose sum is σ = 194656392. Its totient is φ = 57675936.

The previous prime is 122561371. The next prime is 122561431. The reversal of 122561398 is 893165221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1802340 + ... + 1802407.

It is an arithmetic number, because the mean of its divisors is an integer number (24332049).

Almost surely, 2^122561398 is an apocalyptic number.

122561398 is a deficient number, since it is larger than the sum of its proper divisors (72094994).

122561398 is a wasteful number, since it uses less digits than its factorization.

122561398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604766.

The product of its digits is 25920, while the sum is 37.

The square root of 122561398 is about 11070.7451420399. The cubic root of 122561398 is about 496.7271543725.

The spelling of 122561398 in words is "one hundred twenty-two million, five hundred sixty-one thousand, three hundred ninety-eight".