122551 has 8 divisors (see below), whose sum is σ = 144144. Its totient is φ = 102720.

The previous prime is 122533. The next prime is 122557. The reversal of 122551 is 155221.

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 122551 - 2⁹ = 122039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122557) 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 7 ways as a sum of consecutive naturals, for example, 286 + ... + 571.

It is an arithmetic number, because the mean of its divisors is an integer number (18018).

2¹²²⁵⁵¹ is an apocalyptic number.

122551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

122551 is the 286-th pentagonal number.

122551 is a deficient number, since it is larger than the sum of its proper divisors (21593).

122551 is a wasteful number, since it uses less digits than its factorization.

122551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its digits is 100, while the sum is 16.

The square root of 122551 is about 350.0728495613. The cubic root of 122551 is about 49.6713106679.

Adding to 122551 its reverse (155221), we get a palindrome (277772).

The spelling of 122551 in words is "one hundred twenty-two thousand, five hundred fifty-one".