123455245 has 4 divisors (see below), whose sum is σ = 148146300. Its totient is φ = 98764192.

The previous prime is 123455243. The next prime is 123455261. The reversal of 123455245 is 542554321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542554321 = 251 ⋅2161571.

It can be written as a sum of positive squares in 2 ways, for example, as 26904969 + 96550276 = 5187^2 + 9826^2 .

It is a cyclic number.

It is not a de Polignac number, because 123455245 - 2¹ = 123455243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123455243) 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, 12345520 + ... + 12345529.

It is an arithmetic number, because the mean of its divisors is an integer number (37036575).

Almost surely, 2^123455245 is an apocalyptic number.

It is an amenable number.

123455245 is a deficient number, since it is larger than the sum of its proper divisors (24691055).

123455245 is an equidigital number, since it uses as much as digits as its factorization.

123455245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24691054.

The product of its digits is 24000, while the sum is 31.

The square root of 123455245 is about 11111.0415803380. The cubic root of 123455245 is about 497.9317834228.

The spelling of 123455245 in words is "one hundred twenty-three million, four hundred fifty-five thousand, two hundred forty-five".