16487421 has 8 divisors (see below), whose sum is σ = 23140320. Its totient is φ = 10413072.

The previous prime is 16487417. The next prime is 16487431. The reversal of 16487421 is 12478461.

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

It is not a de Polignac number, because 16487421 - 2² = 16487417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16487431) 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, 144570 + ... + 144683.

It is an arithmetic number, because the mean of its divisors is an integer number (2892540).

Almost surely, 2^16487421 is an apocalyptic number.

It is an amenable number.

16487421 is a deficient number, since it is larger than the sum of its proper divisors (6652899).

16487421 is a wasteful number, since it uses less digits than its factorization.

16487421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289275.

The product of its digits is 10752, while the sum is 33.

The square root of 16487421 is about 4060.4705392356. The cubic root of 16487421 is about 254.5174573065.

The spelling of 16487421 in words is "sixteen million, four hundred eighty-seven thousand, four hundred twenty-one".