123021442 has 8 divisors (see below), whose sum is σ = 184677696. Its totient is φ = 61462212.

The previous prime is 123021413. The next prime is 123021473. The reversal of 123021442 is 244120321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20998 + ... + 26209.

It is an arithmetic number, because the mean of its divisors is an integer number (23084712).

Almost surely, 2^123021442 is an apocalyptic number.

123021442 is a deficient number, since it is larger than the sum of its proper divisors (61656254).

123021442 is a wasteful number, since it uses less digits than its factorization.

123021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48512.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 123021442 is about 11091.5031442992. The cubic root of 123021442 is about 497.3478800587.

Adding to 123021442 its reverse (244120321), we get a palindrome (367141763).

The spelling of 123021442 in words is "one hundred twenty-three million, twenty-one thousand, four hundred forty-two".