147021621 has 4 divisors (see below), whose sum is σ = 196028832. Its totient is φ = 98014412.

The previous prime is 147021587. The next prime is 147021643. The reversal of 147021621 is 126120741.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 147021621 - 2⁶ = 147021557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 147021591 and 147021600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147021671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24503601 + ... + 24503606.

It is an arithmetic number, because the mean of its divisors is an integer number (49007208).

Almost surely, 2^147021621 is an apocalyptic number.

It is an amenable number.

147021621 is a deficient number, since it is larger than the sum of its proper divisors (49007211).

147021621 is an equidigital number, since it uses as much as digits as its factorization.

147021621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49007210.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 147021621 is about 12125.2472552109. The cubic root of 147021621 is about 527.7890822801.

The spelling of 147021621 in words is "one hundred forty-seven million, twenty-one thousand, six hundred twenty-one".