122561815 has 8 divisors (see below), whose sum is σ = 147391920. Its totient is φ = 97837632.

The previous prime is 122561809. The next prime is 122561839. The reversal of 122561815 is 518165221.

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

It is a cyclic number.

It is not a de Polignac number, because 122561815 - 2⁹ = 122561303 is a prime.

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, 23910 + ... + 28579.

It is an arithmetic number, because the mean of its divisors is an integer number (18423990).

Almost surely, 2^122561815 is an apocalyptic number.

122561815 is a deficient number, since it is larger than the sum of its proper divisors (24830105).

122561815 is an equidigital number, since it uses as much as digits as its factorization.

122561815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52961.

The product of its digits is 4800, while the sum is 31.

The square root of 122561815 is about 11070.7639754445. The cubic root of 122561815 is about 496.7277177228.

The spelling of 122561815 in words is "one hundred twenty-two million, five hundred sixty-one thousand, eight hundred fifteen".