13421645 has 8 divisors (see below), whose sum is σ = 16287480. Its totient is φ = 10616320.

The previous prime is 13421591. The next prime is 13421651. The reversal of 13421645 is 54612431.

13421645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1297321 + 12124324 = 1139^2 + 3482^2 .

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

It is not a de Polignac number, because 13421645 - 2¹⁴ = 13405261 is a prime.

It is a super-3 number, since 3×13421645³ (a number of 22 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14636 + ... + 15525.

It is an arithmetic number, because the mean of its divisors is an integer number (2035935).

Almost surely, 2^13421645 is an apocalyptic number.

It is an amenable number.

13421645 is a deficient number, since it is larger than the sum of its proper divisors (2865835).

13421645 is an equidigital number, since it uses as much as digits as its factorization.

13421645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255.

The product of its digits is 2880, while the sum is 26.

The square root of 13421645 is about 3663.5563323088. The cubic root of 13421645 is about 237.6485939921.

The spelling of 13421645 in words is "thirteen million, four hundred twenty-one thousand, six hundred forty-five".