15493421 has 8 divisors (see below), whose sum is σ = 16206720. Its totient is φ = 14783472.

The previous prime is 15493411. The next prime is 15493427. The reversal of 15493421 is 12439451.

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 15493421 - 2¹⁴ = 15477037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15493427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16400 + ... + 17318.

It is an arithmetic number, because the mean of its divisors is an integer number (2025840).

Almost surely, 2^15493421 is an apocalyptic number.

It is an amenable number.

15493421 is a deficient number, since it is larger than the sum of its proper divisors (713299).

15493421 is an equidigital number, since it uses as much as digits as its factorization.

15493421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its digits is 4320, while the sum is 29.

The square root of 15493421 is about 3936.1683144906. The cubic root of 15493421 is about 249.2962662272.

The spelling of 15493421 in words is "fifteen million, four hundred ninety-three thousand, four hundred twenty-one".