1252040123406 has 8 divisors (see below), whose sum is σ = 2504080246824. Its totient is φ = 417346707800.

The previous prime is 1252040123371. The next prime is 1252040123441. The reversal of 1252040123406 is 6043210402521.

It is an interprime number because it is at equal distance from previous prime (1252040123371) and next prime (1252040123441).

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

1252040123406 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 104336676945 + ... + 104336676956.

It is an arithmetic number, because the mean of its divisors is an integer number (313010030853).

Almost surely, 2^{1252040123406} is an apocalyptic number.

1252040123406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1252040123406 is a wasteful number, since it uses less digits than its factorization.

1252040123406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208673353906.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1252040123406 its reverse (6043210402521), we get a palindrome (7295250525927).

The spelling of 1252040123406 in words is "one trillion, two hundred fifty-two billion, forty million, one hundred twenty-three thousand, four hundred six".