122561413 has 4 divisors (see below), whose sum is σ = 131989228. Its totient is φ = 113133600.

The previous prime is 122561371. The next prime is 122561431. The reversal of 122561413 is 314165221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314165221 = 17623 ⋅17827.

It can be written as a sum of positive squares in 2 ways, for example, as 39350529 + 83210884 = 6273^2 + 9122^2 .

It is a cyclic number.

It is not a de Polignac number, because 122561413 - 2⁹ = 122560901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122561473) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4713888 + ... + 4713913.

It is an arithmetic number, because the mean of its divisors is an integer number (32997307).

Almost surely, 2^122561413 is an apocalyptic number.

122561413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

122561413 is a deficient number, since it is larger than the sum of its proper divisors (9427815).

122561413 is an equidigital number, since it uses as much as digits as its factorization.

122561413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9427814.

The product of its digits is 1440, while the sum is 25.

The square root of 122561413 is about 11070.7458195011. The cubic root of 122561413 is about 496.7271746369.

The spelling of 122561413 in words is "one hundred twenty-two million, five hundred sixty-one thousand, four hundred thirteen".