15120401 has 4 divisors (see below), whose sum is σ = 15128304. Its totient is φ = 15112500.

The previous prime is 15120379. The next prime is 15120403. The reversal of 15120401 is 10402151.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15120401 - 2⁶ = 15120337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15120403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926 + ... + 5576.

It is an arithmetic number, because the mean of its divisors is an integer number (3782076).

Almost surely, 2^15120401 is an apocalyptic number.

It is an amenable number.

15120401 is a deficient number, since it is larger than the sum of its proper divisors (7903).

15120401 is an equidigital number, since it uses as much as digits as its factorization.

15120401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7902.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 15120401 is about 3888.4959817390. The cubic root of 15120401 is about 247.2793039949.

Adding to 15120401 its reverse (10402151), we get a palindrome (25522552).

The spelling of 15120401 in words is "fifteen million, one hundred twenty thousand, four hundred one".