123040425 has 12 divisors (see below), whose sum is σ = 203426960. Its totient is φ = 65621520.

The previous prime is 123040403. The next prime is 123040427. The reversal of 123040425 is 524040321.

It is not a de Polignac number, because 123040425 - 2⁷ = 123040297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123040427) 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, 820195 + ... + 820344.

Almost surely, 2^123040425 is an apocalyptic number.

123040425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123040425 is a deficient number, since it is larger than the sum of its proper divisors (80386535).

123040425 is a wasteful number, since it uses less digits than its factorization.

123040425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640552 (or 1640547 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 123040425 is about 11092.3588564381. The cubic root of 123040425 is about 497.3734600690.

Adding to 123040425 its reverse (524040321), we get a palindrome (647080746).

The spelling of 123040425 in words is "one hundred twenty-three million, forty thousand, four hundred twenty-five".