123400625 has 10 divisors (see below), whose sum is σ = 154202202. Its totient is φ = 98720000.

The previous prime is 123400619. The next prime is 123400643. The reversal of 123400625 is 526004321.

It can be written as a sum of positive squares in 5 ways, for example, as 52823824 + 70576801 = 7268^2 + 8401^2 .

It is not a de Polignac number, because 123400625 - 2¹⁶ = 123335089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123400625.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 98096 + ... + 99345.

Almost surely, 2^123400625 is an apocalyptic number.

It is an amenable number.

123400625 is a deficient number, since it is larger than the sum of its proper divisors (30801577).

123400625 is an frugal number, since it uses more digits than its factorization.

123400625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197461 (or 197446 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 123400625 is about 11108.5833930344. The cubic root of 123400625 is about 497.8583396797.

Adding to 123400625 its reverse (526004321), we get a palindrome (649404946).

The spelling of 123400625 in words is "one hundred twenty-three million, four hundred thousand, six hundred twenty-five".