123240130134 has 64 divisors (see below), whose sum is σ = 276829774848. Its totient is φ = 36253072800.

The previous prime is 123240130073. The next prime is 123240130171. The reversal of 123240130134 is 431031042321.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329389 + ... + 595799.

It is an arithmetic number, because the mean of its divisors is an integer number (4325465232).

Almost surely, 2^123240130134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123240130134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138414887424).

123240130134 is an abundant number, since it is smaller than the sum of its proper divisors (153589644714).

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

123240130134 is a wasteful number, since it uses less digits than its factorization.

123240130134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266633.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123240130134 its reverse (431031042321), we get a palindrome (554271172455).

The spelling of 123240130134 in words is "one hundred twenty-three billion, two hundred forty million, one hundred thirty thousand, one hundred thirty-four".