145221023 has 8 divisors (see below), whose sum is σ = 148747968. Its totient is φ = 141712384.

The previous prime is 145221001. The next prime is 145221031. The reversal of 145221023 is 320122541.

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 145221023 - 2¹⁴ = 145204639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145220986 and 145221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145221073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12215 + ... + 20967.

It is an arithmetic number, because the mean of its divisors is an integer number (18593496).

Almost surely, 2^145221023 is an apocalyptic number.

145221023 is a deficient number, since it is larger than the sum of its proper divisors (3526945).

145221023 is an equidigital number, since it uses as much as digits as its factorization.

145221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9153.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 145221023 is about 12050.7685647016. The cubic root of 145221023 is about 525.6255859310.

Adding to 145221023 its reverse (320122541), we get a palindrome (465343564).

The spelling of 145221023 in words is "one hundred forty-five million, two hundred twenty-one thousand, twenty-three".