15456401 has 4 divisors (see below), whose sum is σ = 15495732. Its totient is φ = 15417072.

The previous prime is 15456379. The next prime is 15456403. The reversal of 15456401 is 10465451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3519376 + 11937025 = 1876^2 + 3455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15456401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15456403) 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, 19070 + ... + 19863.

It is an arithmetic number, because the mean of its divisors is an integer number (3873933).

Almost surely, 2^15456401 is an apocalyptic number.

It is an amenable number.

15456401 is a deficient number, since it is larger than the sum of its proper divisors (39331).

15456401 is an equidigital number, since it uses as much as digits as its factorization.

15456401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39330.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 15456401 is about 3931.4629592558. The cubic root of 15456401 is about 249.0975516007.

The spelling of 15456401 in words is "fifteen million, four hundred fifty-six thousand, four hundred one".