16420125 has 16 divisors (see below), whose sum is σ = 27323712. Its totient is φ = 8757200.

The previous prime is 16420121. The next prime is 16420127. The reversal of 16420125 is 52102461.

It is not a de Polignac number, because 16420125 - 2² = 16420121 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16420121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21519 + ... + 22268.

It is an arithmetic number, because the mean of its divisors is an integer number (1707732).

Almost surely, 2^16420125 is an apocalyptic number.

16420125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16420125 is a deficient number, since it is larger than the sum of its proper divisors (10903587).

16420125 is an equidigital number, since it uses as much as digits as its factorization.

16420125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43805 (or 43795 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16420125 is about 4052.1753417146. The cubic root of 16420125 is about 254.1707007631.

Adding to 16420125 its reverse (52102461), we get a palindrome (68522586).

The spelling of 16420125 in words is "sixteen million, four hundred twenty thousand, one hundred twenty-five".