123040401 has 32 divisors (see below), whose sum is σ = 184384512. Its totient is φ = 72346560.

The previous prime is 123040343. The next prime is 123040403. The reversal of 123040401 is 104040321.

It is not a de Polignac number, because 123040401 - 2⁷ = 123040273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123040403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 179806 + ... + 180488.

It is an arithmetic number, because the mean of its divisors is an integer number (5762016).

Almost surely, 2^123040401 is an apocalyptic number.

123040401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123040401 is a deficient number, since it is larger than the sum of its proper divisors (61344111).

123040401 is a wasteful number, since it uses less digits than its factorization.

123040401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 123040401 is about 11092.3577746122. The cubic root of 123040401 is about 497.3734277301.

Adding to 123040401 its reverse (104040321), we get a palindrome (227080722).

The spelling of 123040401 in words is "one hundred twenty-three million, forty thousand, four hundred one".