10400015 has 4 divisors (see below), whose sum is σ = 12480024. Its totient is φ = 8320008.

The previous prime is 10399993. The next prime is 10400021. The reversal of 10400015 is 51000401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51000401 = 151 ⋅337751.

It is a cyclic number.

It is not a de Polignac number, because 10400015 - 2¹⁶ = 10334479 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10399969 and 10400005.

It is a congruent number.

It is an unprimeable number.

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, 1039997 + ... + 1040006.

It is an arithmetic number, because the mean of its divisors is an integer number (3120006).

Almost surely, 2^10400015 is an apocalyptic number.

10400015 is a deficient number, since it is larger than the sum of its proper divisors (2080009).

10400015 is an equidigital number, since it uses as much as digits as its factorization.

10400015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080008.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 10400015 is about 3224.9054249699. The cubic root of 10400015 is about 218.2786815538.

Adding to 10400015 its reverse (51000401), we get a palindrome (61400416).

The spelling of 10400015 in words is "ten million, four hundred thousand, fifteen".