147720 has 32 divisors (see below), whose sum is σ = 443520. Its totient is φ = 39360.

The previous prime is 147709. The next prime is 147727. The reversal of 147720 is 27741.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147720.

It is not an unprimeable number, because it can be changed into a prime (147727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496 + ... + 735.

It is an arithmetic number, because the mean of its divisors is an integer number (13860).

2¹⁴⁷⁷²⁰ is an apocalyptic number.

147720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

147720 is an abundant number, since it is smaller than the sum of its proper divisors (295800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

147720 is a wasteful number, since it uses less digits than its factorization.

147720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1241 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 147720 is about 384.3435962781. The cubic root of 147720 is about 52.8623460042.

Adding to 147720 its sum of digits (21), we get a palindrome (147741).

The spelling of 147720 in words is "one hundred forty-seven thousand, seven hundred twenty", and thus it is an iban number.