16401525 has 36 divisors (see below), whose sum is σ = 31551552. Its totient is φ = 7496160.

The previous prime is 16401523. The next prime is 16401527. The reversal of 16401525 is 52510461.

It is an interprime number because it is at equal distance from previous prime (16401523) and next prime (16401527).

It is not a de Polignac number, because 16401525 - 2¹ = 16401523 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16401495 and 16401504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1444 + ... + 5906.

It is an arithmetic number, because the mean of its divisors is an integer number (876432).

Almost surely, 2^16401525 is an apocalyptic number.

16401525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16401525 is a deficient number, since it is larger than the sum of its proper divisors (15150027).

16401525 is a wasteful number, since it uses less digits than its factorization.

16401525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490 (or 4478 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 16401525 is about 4049.8796278408. The cubic root of 16401525 is about 254.0746933490.

Adding to 16401525 its reverse (52510461), we get a palindrome (68911986).

The spelling of 16401525 in words is "sixteen million, four hundred one thousand, five hundred twenty-five".