16271397 has 12 divisors (see below), whose sum is σ = 24885900. Its totient is φ = 10209408.

The previous prime is 16271347. The next prime is 16271443. The reversal of 16271397 is 79317261.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11249316 + 5022081 = 3354^2 + 2241^2 .

It is not a de Polignac number, because 16271397 - 2²³ = 7882789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16271317) 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, 53022 + ... + 53327.

It is an arithmetic number, because the mean of its divisors is an integer number (2073825).

Almost surely, 2^16271397 is an apocalyptic number.

16271397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16271397 is a deficient number, since it is larger than the sum of its proper divisors (8614503).

16271397 is a wasteful number, since it uses less digits than its factorization.

16271397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106372 (or 106369 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 16271397 is about 4033.7819722935. The cubic root of 16271397 is about 253.4009743587.

The spelling of 16271397 in words is "sixteen million, two hundred seventy-one thousand, three hundred ninety-seven".