123220442 has 16 divisors (see below), whose sum is σ = 189695520. Its totient is φ = 60005712.

The previous prime is 123220421. The next prime is 123220459. The reversal of 123220442 is 244022321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10553 + ... + 18915.

It is an arithmetic number, because the mean of its divisors is an integer number (11855970).

Almost surely, 2^123220442 is an apocalyptic number.

123220442 is a deficient number, since it is larger than the sum of its proper divisors (66475078).

123220442 is a wasteful number, since it uses less digits than its factorization.

123220442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8557.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 123220442 is about 11100.4703503951. The cubic root of 123220442 is about 497.6159062620.

Adding to 123220442 its reverse (244022321), we get a palindrome (367242763).

The spelling of 123220442 in words is "one hundred twenty-three million, two hundred twenty thousand, four hundred forty-two".