15406401 has 8 divisors (see below), whose sum is σ = 20634880. Its totient is φ = 10224432.

The previous prime is 15406399. The next prime is 15406429. The reversal of 15406401 is 10460451.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15406401 - 2¹ = 15406399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15406441) 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 7 ways as a sum of consecutive naturals, for example, 10846 + ... + 12183.

It is an arithmetic number, because the mean of its divisors is an integer number (2579360).

Almost surely, 2^15406401 is an apocalyptic number.

It is an amenable number.

15406401 is a deficient number, since it is larger than the sum of its proper divisors (5228479).

15406401 is a wasteful number, since it uses less digits than its factorization.

15406401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23255.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 15406401 is about 3925.0988522584. The cubic root of 15406401 is about 248.8286590798.

Adding to 15406401 its reverse (10460451), we get a palindrome (25866852).

The spelling of 15406401 in words is "fifteen million, four hundred six thousand, four hundred one".