13730421 has 8 divisors (see below), whose sum is σ = 18617760. Its totient is φ = 8998352.

The previous prime is 13730419. The next prime is 13730501. The reversal of 13730421 is 12403731.

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 13730421 - 2¹ = 13730419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13730411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38610 + ... + 38963.

It is an arithmetic number, because the mean of its divisors is an integer number (2327220).

Almost surely, 2^13730421 is an apocalyptic number.

It is an amenable number.

13730421 is a deficient number, since it is larger than the sum of its proper divisors (4887339).

13730421 is an equidigital number, since it uses as much as digits as its factorization.

13730421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77635.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 13730421 is about 3705.4582712534. The cubic root of 13730421 is about 239.4572282817.

The spelling of 13730421 in words is "thirteen million, seven hundred thirty thousand, four hundred twenty-one".