122628457 has 4 divisors (see below), whose sum is σ = 140146816. Its totient is φ = 105110100.

The previous prime is 122628449. The next prime is 122628481. The reversal of 122628457 is 754826221.

It is a happy number.

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: 754826221 = 67 ⋅11266063.

It is a cyclic number.

It is not a de Polignac number, because 122628457 - 2³ = 122628449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122628427) 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, 8759169 + ... + 8759182.

It is an arithmetic number, because the mean of its divisors is an integer number (35036704).

Almost surely, 2^122628457 is an apocalyptic number.

It is an amenable number.

122628457 is a deficient number, since it is larger than the sum of its proper divisors (17518359).

122628457 is an equidigital number, since it uses as much as digits as its factorization.

122628457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17518358.

The product of its digits is 53760, while the sum is 37.

The square root of 122628457 is about 11073.7733857976. The cubic root of 122628457 is about 496.8177319755.

The spelling of 122628457 in words is "one hundred twenty-two million, six hundred twenty-eight thousand, four hundred fifty-seven".