147721541 has 8 divisors (see below), whose sum is σ = 166349568. Its totient is φ = 129960000.

The previous prime is 147721531. The next prime is 147721549. The reversal of 147721541 is 145127741.

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 147721541 - 2⁶ = 147721477 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 147721498 and 147721507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147721549) 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, 216260 + ... + 216941.

It is an arithmetic number, because the mean of its divisors is an integer number (20793696).

Almost surely, 2^147721541 is an apocalyptic number.

147721541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

147721541 is a deficient number, since it is larger than the sum of its proper divisors (18628027).

147721541 is a wasteful number, since it uses less digits than its factorization.

147721541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433243.

The product of its digits is 7840, while the sum is 32.

The square root of 147721541 is about 12154.0750779317. The cubic root of 147721541 is about 528.6252982176.

The spelling of 147721541 in words is "one hundred forty-seven million, seven hundred twenty-one thousand, five hundred forty-one".