31240125 has 48 divisors (see below), whose sum is σ = 64376832. Its totient is φ = 14277600.

The previous prime is 31240117. The next prime is 31240127. The reversal of 31240125 is 52104213.

It is not a de Polignac number, because 31240125 - 2³ = 31240117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31240098 and 31240107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31240127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5892 + ... + 9858.

It is an arithmetic number, because the mean of its divisors is an integer number (1341184).

Almost surely, 2^31240125 is an apocalyptic number.

31240125 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31240125 is an abundant number, since it is smaller than the sum of its proper divisors (33136707).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31240125 is a wasteful number, since it uses less digits than its factorization.

31240125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995 (or 3982 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31240125 is about 5589.2866271108. The cubic root of 31240125 is about 314.9470810574.

Adding to 31240125 its reverse (52104213), we get a palindrome (83344338).

The spelling of 31240125 in words is "thirty-one million, two hundred forty thousand, one hundred twenty-five".