30420125 has 16 divisors (see below), whose sum is σ = 38122032. Its totient is φ = 24235200.

The previous prime is 30420119. The next prime is 30420161. The reversal of 30420125 is 52102403.

It can be written as a sum of positive squares in 8 ways, for example, as 18156121 + 12264004 = 4261^2 + 3502^2 .

It is not a de Polignac number, because 30420125 - 2⁴ = 30420109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49319 + ... + 49931.

It is an arithmetic number, because the mean of its divisors is an integer number (2382627).

Almost surely, 2^30420125 is an apocalyptic number.

It is an amenable number.

30420125 is a deficient number, since it is larger than the sum of its proper divisors (7701907).

30420125 is an equidigital number, since it uses as much as digits as its factorization.

30420125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 30420125 is about 5515.4442250829. Note that the first 3 decimals coincide. The cubic root of 30420125 is about 312.1670052925.

Adding to 30420125 its reverse (52102403), we get a palindrome (82522528).

It can be divided in two parts, 30420 and 125, that multiplied together give a square (3802500 = 1950²).

The spelling of 30420125 in words is "thirty million, four hundred twenty thousand, one hundred twenty-five".