15394121 has 4 divisors (see below), whose sum is σ = 15623952. Its totient is φ = 15164292.

The previous prime is 15394097. The next prime is 15394133. The reversal of 15394121 is 12149351.

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 a de Polignac number, because none of the positive numbers 2^k-15394121 is a prime.

It is a super-2 number, since 2×15394121² = 473957922725282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15390121) 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 3 ways as a sum of consecutive naturals, for example, 114815 + ... + 114948.

It is an arithmetic number, because the mean of its divisors is an integer number (3905988).

Almost surely, 2^15394121 is an apocalyptic number.

It is an amenable number.

15394121 is a deficient number, since it is larger than the sum of its proper divisors (229831).

15394121 is an equidigital number, since it uses as much as digits as its factorization.

15394121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229830.

The product of its digits is 1080, while the sum is 26.

The square root of 15394121 is about 3923.5342486080. The cubic root of 15394121 is about 248.7625301130.

The spelling of 15394121 in words is "fifteen million, three hundred ninety-four thousand, one hundred twenty-one".