16401249 has 12 divisors (see below), whose sum is σ = 24331476. Its totient is φ = 10638432.

The previous prime is 16401239. The next prime is 16401251. The reversal of 16401249 is 94210461.

16401249 is a `hidden beast` number, since 1 + 640 + 12 + 4 + 9 = 666.

16401249 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8381025 + 8020224 = 2895^2 + 2832^2 .

It is not a de Polignac number, because 16401249 - 2⁹ = 16400737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16401239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24294 + ... + 24959.

It is an arithmetic number, because the mean of its divisors is an integer number (2027623).

Almost surely, 2^16401249 is an apocalyptic number.

It is an amenable number.

16401249 is a deficient number, since it is larger than the sum of its proper divisors (7930227).

16401249 is a wasteful number, since it uses less digits than its factorization.

16401249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49296 (or 49293 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16401249 is about 4049.8455526106. The cubic root of 16401249 is about 254.0732681765.

The spelling of 16401249 in words is "sixteen million, four hundred one thousand, two hundred forty-nine".