13470921 has 8 divisors (see below), whose sum is σ = 19956960. Its totient is φ = 8980596.

The previous prime is 13470913. The next prime is 13470929. The reversal of 13470921 is 12907431.

13470921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13470913) and next prime (13470929).

It is not a de Polignac number, because 13470921 - 2³ = 13470913 is a prime.

It is a super-3 number, since 3×13470921³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 498923 = 13470921 / (1 + 3 + 4 + 7 + 0 + 9 + 2 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13470929) 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, 249435 + ... + 249488.

It is an arithmetic number, because the mean of its divisors is an integer number (2494620).

Almost surely, 2^13470921 is an apocalyptic number.

It is an amenable number.

13470921 is a deficient number, since it is larger than the sum of its proper divisors (6486039).

13470921 is an equidigital number, since it uses as much as digits as its factorization.

13470921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498932 (or 498926 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 13470921 is about 3670.2753302716. The cubic root of 13470921 is about 237.9390718033.

The spelling of 13470921 in words is "thirteen million, four hundred seventy thousand, nine hundred twenty-one".