31425 has 12 divisors (see below), whose sum is σ = 52080. Its totient is φ = 16720.

The previous prime is 31397. The next prime is 31469. The reversal of 31425 is 52413.

31425 is digitally balanced in base 4 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 31425 - 2⁵ = 31393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

31425 is strictly pandigital in base 6.

It is a Curzon number.

31425 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 31425.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135 + ... + 284.

It is an arithmetic number, because the mean of its divisors is an integer number (4340).

2³¹⁴²⁵ is an apocalyptic number.

It is an amenable number.

31425 is a deficient number, since it is larger than the sum of its proper divisors (20655).

31425 is a wasteful number, since it uses less digits than its factorization.

31425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432 (or 427 counting only the distinct ones).

The product of its digits is 120, while the sum is 15.

The square root of 31425 is about 177.2709790124. The cubic root of 31425 is about 31.5567131501.

Adding to 31425 its reverse (52413), we get a palindrome (83838).

The spelling of 31425 in words is "thirty-one thousand, four hundred twenty-five".