15214121 has 4 divisors (see below), whose sum is σ = 16384452. Its totient is φ = 14043792.

The previous prime is 15214103. The next prime is 15214151. The reversal of 15214121 is 12141251.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8265625 + 6948496 = 2875^2 + 2636^2 .

It is a cyclic number.

It is not a de Polignac number, because 15214121 - 2¹⁸ = 14951977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15214121.

It is not an unprimeable number, because it can be changed into a prime (15214151) 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, 585146 + ... + 585171.

It is an arithmetic number, because the mean of its divisors is an integer number (4096113).

Almost surely, 2^15214121 is an apocalyptic number.

It is an amenable number.

15214121 is a deficient number, since it is larger than the sum of its proper divisors (1170331).

15214121 is a wasteful number, since it uses less digits than its factorization.

15214121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170330.

The product of its digits is 80, while the sum is 17.

The square root of 15214121 is about 3900.5282975515. The cubic root of 15214121 is about 247.7891515637.

Adding to 15214121 its reverse (12141251), we get a palindrome (27355372).

The spelling of 15214121 in words is "fifteen million, two hundred fourteen thousand, one hundred twenty-one".