15148021 has 4 divisors (see below), whose sum is σ = 17312032. Its totient is φ = 12984012.

The previous prime is 15148009. The next prime is 15148031. The reversal of 15148021 is 12084151.

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 15148021 - 2⁷ = 15147893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15147983 and 15148001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15148031) 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, 1081995 + ... + 1082008.

It is an arithmetic number, because the mean of its divisors is an integer number (4328008).

Almost surely, 2^15148021 is an apocalyptic number.

It is an amenable number.

15148021 is a deficient number, since it is larger than the sum of its proper divisors (2164011).

15148021 is an equidigital number, since it uses as much as digits as its factorization.

15148021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164010.

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 15148021 is about 3892.0458630391. The cubic root of 15148021 is about 247.4297783983.

The spelling of 15148021 in words is "fifteen million, one hundred forty-eight thousand, twenty-one".