13470721 has 8 divisors (see below), whose sum is σ = 14785344. Its totient is φ = 12171120.

The previous prime is 13470719. The next prime is 13470727. The reversal of 13470721 is 12707431.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13470721 - 2¹ = 13470719 is a prime.

It is a super-3 number, since 3×13470721³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13470727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1830 + ... + 5503.

It is an arithmetic number, because the mean of its divisors is an integer number (1848168).

Almost surely, 2^13470721 is an apocalyptic number.

13470721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13470721 is a deficient number, since it is larger than the sum of its proper divisors (1314623).

13470721 is a wasteful number, since it uses less digits than its factorization.

13470721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7511.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 13470721 is about 3670.2480842581. The cubic root of 13470721 is about 237.9378942533.

The spelling of 13470721 in words is "thirteen million, four hundred seventy thousand, seven hundred twenty-one".