16401825 has 72 divisors (see below), whose sum is σ = 33584160. Its totient is φ = 7783200.

The previous prime is 16401811. The next prime is 16401839. The reversal of 16401825 is 52810461.

16401825 is a `hidden beast` number, since 1 + 640 + 18 + 2 + 5 = 666.

16401825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16401811) and next prime (16401839).

It is not a de Polignac number, because 16401825 - 2⁴ = 16401809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 348952 + ... + 348998.

Almost surely, 2^16401825 is an apocalyptic number.

16401825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16401825 is an abundant number, since it is smaller than the sum of its proper divisors (17182335).

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

16401825 is a wasteful number, since it uses less digits than its factorization.

16401825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 16401825 is about 4049.9166658093. The cubic root of 16401825 is about 254.0762424314.

The spelling of 16401825 in words is "sixteen million, four hundred one thousand, eight hundred twenty-five".