123040442 has 8 divisors (see below), whose sum is σ = 210926496. Its totient is φ = 52731612.

The previous prime is 123040433. The next prime is 123040459. The reversal of 123040442 is 244040321.

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

It is a super-3 number, since 3×123040442³ (a number of 25 digits) contains 333 as substring.

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, 4394288 + ... + 4394315.

It is an arithmetic number, because the mean of its divisors is an integer number (26365812).

Almost surely, 2^123040442 is an apocalyptic number.

123040442 is a deficient number, since it is larger than the sum of its proper divisors (87886054).

123040442 is an equidigital number, since it uses as much as digits as its factorization.

123040442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8788612.

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

The square root of 123040442 is about 11092.3596227313. The cubic root of 123040442 is about 497.3734829757.

Adding to 123040442 its reverse (244040321), we get a palindrome (367080763).

The spelling of 123040442 in words is "one hundred twenty-three million, forty thousand, four hundred forty-two".