13421811 has 24 divisors (see below), whose sum is σ = 20238336. Its totient is φ = 7893600.

The previous prime is 13421797. The next prime is 13421813. The reversal of 13421811 is 11812431.

It is a happy number.

It is not a de Polignac number, because 13421811 - 2⁶ = 13421747 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (13421813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11086 + ... + 12236.

It is an arithmetic number, because the mean of its divisors is an integer number (843264).

Almost surely, 2^13421811 is an apocalyptic number.

13421811 is a deficient number, since it is larger than the sum of its proper divisors (6816525).

13421811 is a wasteful number, since it uses less digits than its factorization.

13421811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1190 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 13421811 is about 3663.5789878205. The cubic root of 13421811 is about 237.6495737404.

It can be divided in two parts, 134 and 21811, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 13421811 in words is "thirteen million, four hundred twenty-one thousand, eight hundred eleven".