16542749 has 8 divisors (see below), whose sum is σ = 17653440. Its totient is φ = 15456096.

The previous prime is 16542739. The next prime is 16542761. The reversal of 16542749 is 94724561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16542749 - 2⁴ = 16542733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16542709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4577 + ... + 7350.

It is an arithmetic number, because the mean of its divisors is an integer number (2206680).

Almost surely, 2^16542749 is an apocalyptic number.

16542749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16542749 is a deficient number, since it is larger than the sum of its proper divisors (1110691).

16542749 is a wasteful number, since it uses less digits than its factorization.

16542749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12019.

The product of its digits is 60480, while the sum is 38.

The square root of 16542749 is about 4067.2778365880. The cubic root of 16542749 is about 254.8018401552.

The spelling of 16542749 in words is "sixteen million, five hundred forty-two thousand, seven hundred forty-nine".