15121401 has 4 divisors (see below), whose sum is σ = 20161872. Its totient is φ = 10080932.

The previous prime is 15121399. The next prime is 15121409. The reversal of 15121401 is 10412151.

It is a happy number.

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 15121401 - 2¹ = 15121399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15121409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2520231 + ... + 2520236.

It is an arithmetic number, because the mean of its divisors is an integer number (5040468).

Almost surely, 2^15121401 is an apocalyptic number.

It is an amenable number.

15121401 is a deficient number, since it is larger than the sum of its proper divisors (5040471).

15121401 is an equidigital number, since it uses as much as digits as its factorization.

15121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5040470.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 15121401 is about 3888.6245640329. The cubic root of 15121401 is about 247.2847552139.

Adding to 15121401 its reverse (10412151), we get a palindrome (25533552).

The spelling of 15121401 in words is "fifteen million, one hundred twenty-one thousand, four hundred one".