15401243 has 12 divisors (see below), whose sum is σ = 18232704. Its totient is φ = 12922800.

The previous prime is 15401227. The next prime is 15401251. The reversal of 15401243 is 34210451.

It is not a de Polignac number, because 15401243 - 2⁴ = 15401227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15401273) 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 11 ways as a sum of consecutive naturals, for example, 3323 + ... + 6468.

It is an arithmetic number, because the mean of its divisors is an integer number (1519392).

Almost surely, 2^15401243 is an apocalyptic number.

15401243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

15401243 is a deficient number, since it is larger than the sum of its proper divisors (2831461).

15401243 is a wasteful number, since it uses less digits than its factorization.

15401243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9826 (or 9815 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 15401243 is about 3924.4417437388. The cubic root of 15401243 is about 248.8008870414.

Adding to 15401243 its reverse (34210451), we get a palindrome (49611694).

The spelling of 15401243 in words is "fifteen million, four hundred one thousand, two hundred forty-three".