122861621 has 4 divisors (see below), whose sum is σ = 125718912. Its totient is φ = 120004332.

The previous prime is 122861597. The next prime is 122861633. The reversal of 122861621 is 126168221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122861621 - 2²² = 118667317 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 (122861671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428581 + ... + 1428666.

It is an arithmetic number, because the mean of its divisors is an integer number (31429728).

Almost surely, 2^122861621 is an apocalyptic number.

It is an amenable number.

122861621 is a deficient number, since it is larger than the sum of its proper divisors (2857291).

122861621 is an equidigital number, since it uses as much as digits as its factorization.

122861621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857290.

The product of its digits is 2304, while the sum is 29.

The square root of 122861621 is about 11084.2961436439. The cubic root of 122861621 is about 497.1324133338.

The spelling of 122861621 in words is "one hundred twenty-two million, eight hundred sixty-one thousand, six hundred twenty-one".