16134521 has 8 divisors (see below), whose sum is σ = 17474184. Its totient is φ = 14808960.

The previous prime is 16134511. The next prime is 16134529. The reversal of 16134521 is 12543161.

It can be written as a sum of positive squares in 4 ways, for example, as 3610000 + 12524521 = 1900^2 + 3539^2 .

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 16134521 - 2⁶ = 16134457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16134529) 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, 1076 + ... + 5781.

It is an arithmetic number, because the mean of its divisors is an integer number (2184273).

Almost surely, 2^16134521 is an apocalyptic number.

It is an amenable number.

16134521 is a deficient number, since it is larger than the sum of its proper divisors (1339663).

16134521 is a wasteful number, since it uses less digits than its factorization.

16134521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051.

The product of its digits is 720, while the sum is 23.

The square root of 16134521 is about 4016.7799292468. The cubic root of 16134521 is about 252.6884310548.

Adding to 16134521 its reverse (12543161), we get a palindrome (28677682).

The spelling of 16134521 in words is "sixteen million, one hundred thirty-four thousand, five hundred twenty-one".