145533001 has 4 divisors (see below), whose sum is σ = 146287252. Its totient is φ = 144778752.

The previous prime is 145532993. The next prime is 145533053. The reversal of 145533001 is 100335541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32216976 + 113316025 = 5676^2 + 10645^2 .

It is a cyclic number.

It is not a de Polignac number, because 145533001 - 2³ = 145532993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145533061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376836 + ... + 377221.

It is an arithmetic number, because the mean of its divisors is an integer number (36571813).

Almost surely, 2^145533001 is an apocalyptic number.

It is an amenable number.

145533001 is a deficient number, since it is larger than the sum of its proper divisors (754251).

145533001 is an equidigital number, since it uses as much as digits as its factorization.

145533001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754250.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 145533001 is about 12063.7059397185. The cubic root of 145533001 is about 526.0017168039.

Adding to 145533001 its reverse (100335541), we get a palindrome (245868542).

The spelling of 145533001 in words is "one hundred forty-five million, five hundred thirty-three thousand, one".