145460321 has 8 divisors (see below), whose sum is σ = 146336424. Its totient is φ = 144587520.

The previous prime is 145460309. The next prime is 145460323. The reversal of 145460321 is 123064541.

It can be written as a sum of positive squares in 4 ways, for example, as 11826721 + 133633600 = 3439^2 + 11560^2 .

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 145460321 - 2²² = 141266017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145460323) 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, 219731 + ... + 220391.

It is an arithmetic number, because the mean of its divisors is an integer number (18292053).

Almost surely, 2^145460321 is an apocalyptic number.

It is an amenable number.

145460321 is a deficient number, since it is larger than the sum of its proper divisors (876103).

145460321 is an equidigital number, since it uses as much as digits as its factorization.

145460321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 145460321 is about 12060.6932221991. The cubic root of 145460321 is about 525.9141394839.

The spelling of 145460321 in words is "one hundred forty-five million, four hundred sixty thousand, three hundred twenty-one".