145801 has 4 divisors (see below), whose sum is σ = 146704. Its totient is φ = 144900.

The previous prime is 145799. The next prime is 145807. The reversal of 145801 is 108541.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 145801 - 2¹ = 145799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145807) 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, 135 + ... + 556.

It is an arithmetic number, because the mean of its divisors is an integer number (36676).

2¹⁴⁵⁸⁰¹ is an apocalyptic number.

It is an amenable number.

145801 is a deficient number, since it is larger than the sum of its proper divisors (903).

145801 is an equidigital number, since it uses as much as digits as its factorization.

145801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 145801 is about 381.8389712955. The cubic root of 145801 is about 52.6324396175.

It can be divided in two parts, 145 and 801, that added together give a triangular number (946 = T₄₃).

The spelling of 145801 in words is "one hundred forty-five thousand, eight hundred one".