145203001 has 4 divisors (see below), whose sum is σ = 153744372. Its totient is φ = 136661632.

The previous prime is 145202989. The next prime is 145203011. The reversal of 145203001 is 100302541.

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 46717225 + 98485776 = 6835^2 + 9924^2 .

It is a cyclic number.

It is not a de Polignac number, because 145203001 - 2⁵ = 145202969 is a prime.

It is a super-2 number, since 2×145203001² = 42167822998812002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145203011) 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, 4270660 + ... + 4270693.

It is an arithmetic number, because the mean of its divisors is an integer number (38436093).

Almost surely, 2^145203001 is an apocalyptic number.

It is an amenable number.

145203001 is a deficient number, since it is larger than the sum of its proper divisors (8541371).

145203001 is an equidigital number, since it uses as much as digits as its factorization.

145203001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541370.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 145203001 is about 12050.0207883638. The cubic root of 145203001 is about 525.6038415674.

Adding to 145203001 its reverse (100302541), we get a palindrome (245505542).

The spelling of 145203001 in words is "one hundred forty-five million, two hundred three thousand, one".