31245425 has 6 divisors (see below), whose sum is σ = 38744358. Its totient is φ = 24996320.

The previous prime is 31245421. The next prime is 31245451. The reversal of 31245425 is 52454213.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5276209 + 25969216 = 2297^2 + 5096^2 .

It is not a de Polignac number, because 31245425 - 2² = 31245421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31245394 and 31245403.

It is not an unprimeable number, because it can be changed into a prime (31245421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 624884 + ... + 624933.

It is an arithmetic number, because the mean of its divisors is an integer number (6457393).

Almost surely, 2^31245425 is an apocalyptic number.

It is an amenable number.

31245425 is a deficient number, since it is larger than the sum of its proper divisors (7498933).

31245425 is a wasteful number, since it uses less digits than its factorization.

31245425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249827 (or 1249822 counting only the distinct ones).

The product of its digits is 4800, while the sum is 26.

The square root of 31245425 is about 5589.7607283318. The cubic root of 31245425 is about 314.9648906867.

Adding to 31245425 its reverse (52454213), we get a palindrome (83699638).

The spelling of 31245425 in words is "thirty-one million, two hundred forty-five thousand, four hundred twenty-five".