123011442 has 24 divisors (see below), whose sum is σ = 266812416. Its totient is φ = 40959576.

The previous prime is 123011437. The next prime is 123011443. The reversal of 123011442 is 244110321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (123011443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16423 + ... + 22709.

It is an arithmetic number, because the mean of its divisors is an integer number (11117184).

Almost surely, 2^123011442 is an apocalyptic number.

123011442 is an abundant number, since it is smaller than the sum of its proper divisors (143800974).

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

123011442 is a wasteful number, since it uses less digits than its factorization.

123011442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7382 (or 7379 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 123011442 is about 11091.0523396114. The cubic root of 123011442 is about 497.3344037804.

Adding to 123011442 its reverse (244110321), we get a palindrome (367121763).

The spelling of 123011442 in words is "one hundred twenty-three million, eleven thousand, four hundred forty-two".