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147442 = 273721
BaseRepresentation
bin100011111111110010
321111020211
4203333302
514204232
63054334
71152601
oct437762
9244224
10147442
11a0859
12713aa
1352159
143ba38
152da47
hex23ff2

147442 has 4 divisors (see below), whose sum is σ = 221166. Its totient is φ = 73720.

The previous prime is 147419. The next prime is 147449. The reversal of 147442 is 244741.

147442 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244741 = 734963.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 9801 = 371^2 + 99^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (147449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36859 + ... + 36862.

2147442 is an apocalyptic number.

147442 is a deficient number, since it is larger than the sum of its proper divisors (73724).

147442 is an equidigital number, since it uses as much as digits as its factorization.

147442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73723.

The product of its digits is 896, while the sum is 22.

The square root of 147442 is about 383.9817704006. The cubic root of 147442 is about 52.8291639466.

The spelling of 147442 in words is "one hundred forty-seven thousand, four hundred forty-two", and thus it is an iban number.

Divisors: 1 2 73721 147442