147161021 has 4 divisors (see below), whose sum is σ = 168184032. Its totient is φ = 126138012.

The previous prime is 147160997. The next prime is 147161029. The reversal of 147161021 is 120161741.

It is a happy number.

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 not a de Polignac number, because 147161021 - 2⁶ = 147160957 is a prime.

It is a super-2 number, since 2×147161021² = 43312732203524882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147161029) 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, 10511495 + ... + 10511508.

It is an arithmetic number, because the mean of its divisors is an integer number (42046008).

Almost surely, 2^147161021 is an apocalyptic number.

It is an amenable number.

147161021 is a deficient number, since it is larger than the sum of its proper divisors (21023011).

147161021 is an equidigital number, since it uses as much as digits as its factorization.

147161021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21023010.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 147161021 is about 12130.9942296582. The cubic root of 147161021 is about 527.9558390618.

The spelling of 147161021 in words is "one hundred forty-seven million, one hundred sixty-one thousand, twenty-one".