16253971 has 4 divisors (see below), whose sum is σ = 16403200. Its totient is φ = 16104744.

The previous prime is 16253933. The next prime is 16253983. The reversal of 16253971 is 17935261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17935261 = 1777 ⋅10093.

It is a cyclic number.

It is not a de Polignac number, because 16253971 - 2⁷ = 16253843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16253771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74451 + ... + 74668.

It is an arithmetic number, because the mean of its divisors is an integer number (4100800).

Almost surely, 2^16253971 is an apocalyptic number.

16253971 is a deficient number, since it is larger than the sum of its proper divisors (149229).

16253971 is a wasteful number, since it uses less digits than its factorization.

16253971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149228.

The product of its digits is 11340, while the sum is 34.

The square root of 16253971 is about 4031.6213859935. The cubic root of 16253971 is about 253.3104813567.

The spelling of 16253971 in words is "sixteen million, two hundred fifty-three thousand, nine hundred seventy-one".