16142749 has 4 divisors (see below), whose sum is σ = 18448864. Its totient is φ = 13836636.

The previous prime is 16142743. The next prime is 16142783. The reversal of 16142749 is 94724161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16142749 - 2⁵ = 16142717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16142743) 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, 1153047 + ... + 1153060.

It is an arithmetic number, because the mean of its divisors is an integer number (4612216).

Almost surely, 2^16142749 is an apocalyptic number.

It is an amenable number.

16142749 is a deficient number, since it is larger than the sum of its proper divisors (2306115).

16142749 is an equidigital number, since it uses as much as digits as its factorization.

16142749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306114.

The product of its digits is 12096, while the sum is 34.

The square root of 16142749 is about 4017.8040021883. The cubic root of 16142749 is about 252.7313776265.

The spelling of 16142749 in words is "sixteen million, one hundred forty-two thousand, seven hundred forty-nine".