122445521 has 4 divisors (see below), whose sum is σ = 133576944. Its totient is φ = 111314100.

The previous prime is 122445503. The next prime is 122445523. The reversal of 122445521 is 125544221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125544221 = 11 ⋅11413111.

It is a cyclic number.

It is not a de Polignac number, because 122445521 - 2⁶ = 122445457 is a prime.

It is a super-2 number, since 2×122445521² = 29985811225922882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122445523) 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, 5565695 + ... + 5565716.

It is an arithmetic number, because the mean of its divisors is an integer number (33394236).

Almost surely, 2^122445521 is an apocalyptic number.

122445521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122445521 is a deficient number, since it is larger than the sum of its proper divisors (11131423).

122445521 is a wasteful number, since it uses less digits than its factorization.

122445521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11131422.

The product of its digits is 3200, while the sum is 26.

The square root of 122445521 is about 11065.5104265461. The cubic root of 122445521 is about 496.5705596563.

Adding to 122445521 its reverse (125544221), we get a palindrome (247989742).

The spelling of 122445521 in words is "one hundred twenty-two million, four hundred forty-five thousand, five hundred twenty-one".