123431445425 has 12 divisors (see below), whose sum is σ = 153063113676. Its totient is φ = 98739916800.

The previous prime is 123431445391. The next prime is 123431445427. The reversal of 123431445425 is 524544134321.

It can be written as a sum of positive squares in 6 ways, for example, as 13424466496 + 110006978929 = 115864^2 + 331673^2 .

It is not a de Polignac number, because 123431445425 - 2¹⁶ = 123431379889 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123431445427) 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, 390257 + ... + 631793.

It is an arithmetic number, because the mean of its divisors is an integer number (12755259473).

Almost surely, 2^123431445425 is an apocalyptic number.

It is an amenable number.

123431445425 is a deficient number, since it is larger than the sum of its proper divisors (29631668251).

123431445425 is a wasteful number, since it uses less digits than its factorization.

123431445425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261988 (or 261983 counting only the distinct ones).

The product of its digits is 230400, while the sum is 38.

Adding to 123431445425 its reverse (524544134321), we get a palindrome (647975579746).

The spelling of 123431445425 in words is "one hundred twenty-three billion, four hundred thirty-one million, four hundred forty-five thousand, four hundred twenty-five".