123621042 has 32 divisors (see below), whose sum is σ = 264211200. Its totient is φ = 38423808.

The previous prime is 123621041. The next prime is 123621061. The reversal of 123621042 is 240126321.

It is not an unprimeable number, because it can be changed into a prime (123621041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5559 + ... + 16677.

It is an arithmetic number, because the mean of its divisors is an integer number (8256600).

Almost surely, 2^123621042 is an apocalyptic number.

It is a pronic number, being equal to 11118×11119.

123621042 is an abundant number, since it is smaller than the sum of its proper divisors (140590158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123621042 is a wasteful number, since it uses less digits than its factorization.

123621042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11250.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 123621042 is about 11118.4999887575. The cubic root of 123621042 is about 498.1545866117.

Adding to 123621042 its reverse (240126321), we get a palindrome (363747363).

The spelling of 123621042 in words is "one hundred twenty-three million, six hundred twenty-one thousand, forty-two".