16397042 has 4 divisors (see below), whose sum is σ = 24595566. Its totient is φ = 8198520.

The previous prime is 16397039. The next prime is 16397053. The reversal of 16397042 is 24079361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24079361 = 17 ⋅1416433.

It can be written as a sum of positive squares in only one way, i.e., 16313521 + 83521 = 4039^2 + 289^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099259 + ... + 4099262.

Almost surely, 2^16397042 is an apocalyptic number.

16397042 is a deficient number, since it is larger than the sum of its proper divisors (8198524).

16397042 is an equidigital number, since it uses as much as digits as its factorization.

16397042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198523.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 16397042 is about 4049.3261167755. The cubic root of 16397042 is about 254.0515426432.

The spelling of 16397042 in words is "sixteen million, three hundred ninety-seven thousand, forty-two".