123622745 has 4 divisors (see below), whose sum is σ = 148347300. Its totient is φ = 98898192.

The previous prime is 123622739. The next prime is 123622753. The reversal of 123622745 is 547226321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547226321 = 557 ⋅982453.

It can be written as a sum of positive squares in 2 ways, for example, as 63234304 + 60388441 = 7952^2 + 7771^2 .

It is a cyclic number.

It is not a de Polignac number, because 123622745 - 2⁴ = 123622729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12362270 + ... + 12362279.

It is an arithmetic number, because the mean of its divisors is an integer number (37086825).

Almost surely, 2^123622745 is an apocalyptic number.

It is an amenable number.

123622745 is a deficient number, since it is larger than the sum of its proper divisors (24724555).

123622745 is an equidigital number, since it uses as much as digits as its factorization.

123622745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24724554.

The product of its digits is 20160, while the sum is 32.

The square root of 123622745 is about 11118.5765725654. The cubic root of 123622745 is about 498.1568741224.

The spelling of 123622745 in words is "one hundred twenty-three million, six hundred twenty-two thousand, seven hundred forty-five".