123215425 has 24 divisors (see below), whose sum is σ = 158987840. Its totient is φ = 94651200.

The previous prime is 123215419. The next prime is 123215429. The reversal of 123215425 is 524512321.

It is not a de Polignac number, because 123215425 - 2¹³ = 123207233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 123215425.

It is not an unprimeable number, because it can be changed into a prime (123215429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64636 + ... + 66514.

Almost surely, 2^123215425 is an apocalyptic number.

It is an amenable number.

123215425 is a deficient number, since it is larger than the sum of its proper divisors (35772415).

123215425 is a wasteful number, since it uses less digits than its factorization.

123215425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1988 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 123215425 is about 11100.2443666795. The cubic root of 123215425 is about 497.6091525859.

Adding to 123215425 its reverse (524512321), we get a palindrome (647727746).

The spelling of 123215425 in words is "one hundred twenty-three million, two hundred fifteen thousand, four hundred twenty-five".