3129825 has 24 divisors (see below), whose sum is σ = 5356800. Its totient is φ = 1610560.

The previous prime is 3129821. The next prime is 3129827. The reversal of 3129825 is 5289213.

It is a happy number.

It is not a de Polignac number, because 3129825 - 2² = 3129821 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3129792 and 3129801.

It is not an unprimeable number, because it can be changed into a prime (3129821) 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, 1456 + ... + 2894.

It is an arithmetic number, because the mean of its divisors is an integer number (223200).

Almost surely, 2^3129825 is an apocalyptic number.

It is an amenable number.

3129825 is a deficient number, since it is larger than the sum of its proper divisors (2226975).

3129825 is a wasteful number, since it uses less digits than its factorization.

3129825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1481 (or 1476 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 3129825 is about 1769.1311426799. The cubic root of 3129825 is about 146.2760929410.

The spelling of 3129825 in words is "three million, one hundred twenty-nine thousand, eight hundred twenty-five".