1240425 has 36 divisors (see below), whose sum is σ = 2297100. Its totient is φ = 639360.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240425 is 5240421.

1240425 is a `hidden beast` number, since 1 + 240 + 425 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 21609 + 1218816 = 147^2 + 1104^2 .

It is not a de Polignac number, because 1240425 - 2¹ = 1240423 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1240398 and 1240407.

It is not an unprimeable number, because it can be changed into a prime (1240423) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8251 + ... + 8399.

2^1240425 is an apocalyptic number.

1240425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1240425 is a deficient number, since it is larger than the sum of its proper divisors (1056675).

1240425 is a wasteful number, since it uses less digits than its factorization.

1240425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1240425 is about 1113.7436868508. The cubic root of 1240425 is about 107.4459797091.

Adding to 1240425 its reverse (5240421), we get a palindrome (6480846).

The spelling of 1240425 in words is "one million, two hundred forty thousand, four hundred twenty-five".