147421565 has 4 divisors (see below), whose sum is σ = 176905884. Its totient is φ = 117937248.

The previous prime is 147421553. The next prime is 147421597. The reversal of 147421565 is 565124741.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565124741 = 173 ⋅3266617.

It can be written as a sum of positive squares in 2 ways, for example, as 17757796 + 129663769 = 4214^2 + 11387^2 .

It is a cyclic number.

It is not a de Polignac number, because 147421565 - 2¹⁶ = 147356029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14742152 + ... + 14742161.

It is an arithmetic number, because the mean of its divisors is an integer number (44226471).

Almost surely, 2^147421565 is an apocalyptic number.

It is an amenable number.

147421565 is a deficient number, since it is larger than the sum of its proper divisors (29484319).

147421565 is an equidigital number, since it uses as much as digits as its factorization.

147421565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29484318.

The product of its digits is 33600, while the sum is 35.

The square root of 147421565 is about 12141.7282542478. The cubic root of 147421565 is about 528.2672318150.

The spelling of 147421565 in words is "one hundred forty-seven million, four hundred twenty-one thousand, five hundred sixty-five".