147056821 has 16 divisors (see below), whose sum is σ = 153446400. Its totient is φ = 140849280.

The previous prime is 147056803. The next prime is 147056831. The reversal of 147056821 is 128650741.

147056821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 147056821 - 2¹⁷ = 146925749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147056831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738880 + ... + 739078.

It is an arithmetic number, because the mean of its divisors is an integer number (9590400).

Almost surely, 2^147056821 is an apocalyptic number.

It is an amenable number.

147056821 is a deficient number, since it is larger than the sum of its proper divisors (6389579).

147056821 is a wasteful number, since it uses less digits than its factorization.

147056821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 147056821 is about 12126.6986851327. The cubic root of 147056821 is about 527.8312001062.

The spelling of 147056821 in words is "one hundred forty-seven million, fifty-six thousand, eight hundred twenty-one".