147421 has 4 divisors (see below), whose sum is σ = 155200. Its totient is φ = 139644.

The previous prime is 147419. The next prime is 147449. The reversal of 147421 is 124741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124741 = 79 ⋅1579.

It is a cyclic number.

It is not a de Polignac number, because 147421 - 2¹ = 147419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 7759 = 147421 / (1 + 4 + 7 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3861 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (38800).

2¹⁴⁷⁴²¹ is an apocalyptic number.

It is an amenable number.

147421 is a deficient number, since it is larger than the sum of its proper divisors (7779).

147421 is an equidigital number, since it uses as much as digits as its factorization.

147421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7778.

The product of its digits is 224, while the sum is 19.

The square root of 147421 is about 383.9544243787. The cubic root of 147421 is about 52.8266556945.

The spelling of 147421 in words is "one hundred forty-seven thousand, four hundred twenty-one", and thus it is an iban number.