122457 has 4 divisors (see below), whose sum is σ = 163280. Its totient is φ = 81636.

The previous prime is 122453. The next prime is 122471. The reversal of 122457 is 754221.

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 not a de Polignac number, because 122457 - 2² = 122453 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (122453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20407 + ... + 20412.

It is an arithmetic number, because the mean of its divisors is an integer number (40820).

2¹²²⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

122457 is a deficient number, since it is larger than the sum of its proper divisors (40823).

122457 is an equidigital number, since it uses as much as digits as its factorization.

122457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40822.

The product of its digits is 560, while the sum is 21.

The square root of 122457 is about 349.9385660370. The cubic root of 122457 is about 49.6586076640.

Adding to 122457 its reverse (754221), we get a palindrome (876678).

The spelling of 122457 in words is "one hundred twenty-two thousand, four hundred fifty-seven".