122513661 has 16 divisors (see below), whose sum is σ = 187761600. Its totient is φ = 78858864.

The previous prime is 122513647. The next prime is 122513669. The reversal of 122513661 is 166315221.

It is not a de Polignac number, because 122513661 - 2⁶ = 122513597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122513669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77451 + ... + 79016.

It is an arithmetic number, because the mean of its divisors is an integer number (11735100).

Almost surely, 2^122513661 is an apocalyptic number.

It is an amenable number.

122513661 is a deficient number, since it is larger than the sum of its proper divisors (65247939).

122513661 is a wasteful number, since it uses less digits than its factorization.

122513661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156505 (or 156499 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 122513661 is about 11068.5889344577. The cubic root of 122513661 is about 496.6626551533.

Adding to 122513661 its reverse (166315221), we get a palindrome (288828882).

The spelling of 122513661 in words is "one hundred twenty-two million, five hundred thirteen thousand, six hundred sixty-one".