13743421 has 2 divisors, whose sum is σ = 13743422. Its totient is φ = 13743420.

The previous prime is 13743413. The next prime is 13743427. The reversal of 13743421 is 12434731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11655396 + 2088025 = 3414^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 13743421 - 2³ = 13743413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13743427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6871710 + 6871711.

It is an arithmetic number, because the mean of its divisors is an integer number (6871711).

Almost surely, 2^13743421 is an apocalyptic number.

It is an amenable number.

13743421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13743421 is an equidigital number, since it uses as much as digits as its factorization.

13743421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 25.

The square root of 13743421 is about 3707.2120252287. The cubic root of 13743421 is about 239.5327773620.

The spelling of 13743421 in words is "thirteen million, seven hundred forty-three thousand, four hundred twenty-one".