123422515 has 4 divisors (see below), whose sum is σ = 148107024. Its totient is φ = 98738008.

The previous prime is 123422503. The next prime is 123422539. The reversal of 123422515 is 515224321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 515224321 = 17 ⋅30307313.

It is a cyclic number.

It is not a de Polignac number, because 123422515 - 2¹⁹ = 122898227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123422515.

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, 12342247 + ... + 12342256.

It is an arithmetic number, because the mean of its divisors is an integer number (37026756).

Almost surely, 2^123422515 is an apocalyptic number.

123422515 is a deficient number, since it is larger than the sum of its proper divisors (24684509).

123422515 is an equidigital number, since it uses as much as digits as its factorization.

123422515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24684508.

The product of its digits is 2400, while the sum is 25.

The square root of 123422515 is about 11109.5686234885. The cubic root of 123422515 is about 497.8877762532.

Adding to 123422515 its reverse (515224321), we get a palindrome (638646836).

The spelling of 123422515 in words is "one hundred twenty-three million, four hundred twenty-two thousand, five hundred fifteen".